Elbow heat insulation material

Abstract

To be able to form an elbow heat insulation material easily at a cheap price, and to be able to maintain heat insulation performance high.SOLUTION: In an elbow heat insulation material for covering the outside of an elbow joint, a plurality of virtual division members are assumed in order to form a first space 4 in which the elbow joint can be stored, and to provide a divided heat insulation member 5 divided into a plurality of parts at a cross section along a bending central axis direction of the elbow joint. Out of first virtual division members whose shape in a bending central axis direction view is substantially triangle, a residual portion in which a tapered tip portion A of the bending central axis of the elbow joint is cut off is made to be a first shape of a first division member 6, and at a second virtual division member which has a portion adjacent to the first virtual division member, the tapered tip portion which is cut off is integrally continued and made to be a second shape of a second division member 7. By cutting out a cylindrical heat insulation material along the first shape and the second shape, the first division member 6 and the second division member 7 are formed, and by making the first division member 6 and the second division member 7 adjacent to each other, the divided heat insulation member 5 is constituted.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an elbow joint for connecting the ends of two straight pipes whose axial centers intersect with each other, and an elbow heat insulating material for covering the outside thereof.

Background Art

[0002] Conventionally, elbow joints vary from those with a small radius of curvature in the bent portion to those with a large radius of curvature. For the elbow heat insulating materials that thermally insulate these elbow joints, when molding them with foamed resin materials (such as polyurethane foam, polyethylene foam, phenolic foam, etc.) or inorganic porous materials (such as calcium silicate, perlite, etc.), it is costly to integrally mold them according to the bent shape of each individual elbow joint and the pipe diameter. Therefore, it has been considered to form a plurality of divided heat insulating members that are divided into a plurality in the bending direction of the elbow joint by cutting out a plurality from a ready-made cylindrical heat insulating material, and to configure them by combining these divided heat insulating members.

[0003] For example, in Patent Document 1, as shown in Figs. 1 and 2, legs 2 and 3 in which internal grooves 4 are formed are joined, and wedge-shaped members 12 and 13 that are substantially triangular in side view are combined at the corners. Further, in Patent Document 2, as shown in Figs. 1 to 4, a plurality of members 130 that are substantially triangular in side view are divided into a large number at a narrower angle than in Patent Document 1 and assigned to the region between the first and second member groups 110 and 120. Patent Document 2 mainly focuses on displacing one ridge line RL to the inside of the elbow bend and covering the through hole TH3 with the plurality of members 130.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the conventional structure of Patent Document 1 described above, as shown in FIGS. 11 to 12, the tapered tip portion a on the side of the bending central axis P of the elbow joint in a plurality of the divided heat insulating members has a sharp shape when forming a single ridge line Q as described above. Particularly in the case of a hard porous material such as an inorganic porous material, the tapered tip portion a is likely to be chipped. When divided into a larger number than the divided heat insulating members and combined, there is a risk that a defective portion of the heat insulating member will occur and the heat insulating property will be likely to deteriorate. Even when the ridge line as shown in FIG. 10 is not formed, the tapered tip portion a is formed and the same problem occurs.

[0006] An object of the present invention is to solve the above problems, enable an elbow heat insulating material to be formed inexpensively and easily, and maintain high heat insulating performance with respect to the elbow joint.

Means for Solving the Problems

[0007] A first characteristic configuration of the present invention is an elbow heat insulating material that covers the outside of an elbow joint that connects the ends of two straight pipes whose axial centers intersect each other. A first space capable of accommodating the elbow joint is formed inside, and in order to provide divided heat insulating members divided into a plurality in a cross section along the bending central axis direction of the elbow joint, a plurality of virtual divided members having a substantially triangular shape when viewed in the bending central axis direction are assumed. The remaining portion of the first virtual divided member from which the tapered tip portion of the bending central axis of the elbow joint is separated is taken as the first shape of the first divided member, and the separated tapered tip portion is integrally connected to the tip side of the second virtual divided member adjacent to the first virtual divided member to form the second shape of the second divided member. The first divided member and the second divided member are formed by cutting out a cylindrical heat insulating material along the first shape and the second shape, and the divided heat insulating member is configured by adjacently arranging the first divided member and the second divided member.

[0008] According to the first characteristic configuration of the present invention, in order to provide a divided heat insulating member divided into a plurality of parts, the tapered tip portion separated from the first virtual dividing member is integrally connected to the tip side of the second virtual dividing member adjacent to the first virtual dividing member to form the second shape of the second dividing member. As a result, the easily chipped tip portion of the first dividing member disappears, and the tip side of the second dividing member becomes thick and is less likely to chip, and each of the divided heat insulating members can easily maintain its shape. Therefore, the heat insulation property against the elbow joint can be maintained at a high level.

[0009] The second characteristic configuration of the present invention is that the second virtual dividing member also has a substantially triangular shape when viewed in the direction of the bending central axis, and the separated tapered tip portion is integrally connected to the tapered tip portion of the bending central axis of the elbow joint among the second virtual dividing members to form the second shape of the second dividing member.

[0010] According to the second characteristic configuration of the present invention, even in the case of the second virtual dividing member having a substantially triangular shape when viewed in the direction of the bending central axis, by integrally connecting the separated tapered tip portion, the tip side of the second dividing member becomes thick and is less likely to chip, and each of the divided heat insulating members can easily maintain its shape.

[0011] The third characteristic configuration of the present invention is an elbow heat insulating material that covers the outside of an elbow joint that connects the ends of two straight pipes whose axial centers intersect each other. The elbow heat insulating material forms a first space capable of accommodating the elbow joint inside, and in order to provide a divided heat insulating member divided into a plurality of parts in a cross section along the bending central axis direction of the elbow joint, a plurality of virtual dividing members are assumed. A part of the adjacent first virtual dividing member is integrally connected to the tapered tip portion of the bending central axis of the elbow joint among the second virtual dividing members having a substantially triangular shape when viewed in the direction of the bending central axis to form the second shape of the second dividing member, and the remaining portion of the first virtual dividing member from which the part has been separated is made into the first shape of the first dividing member, thereby constituting the divided heat insulating member.

[0012] According to the third characteristic configuration of the present invention, regardless of the shape of a part of an adjacent first virtual dividing member, the part is integrally connected to the tapered tip portion of the bending central axis of the elbow joint in a substantially triangular second virtual dividing member, so that the second dividing member is less likely to be chipped and is more likely to maintain its shape.

[0013] The fourth characteristic configuration of the present invention is that the first virtual dividing member also has a substantially triangular shape when viewed in the direction of the bending central axis, and the tapered tip portion of the first virtual dividing body, which is the separated part, is integrally connected to the tapered tip portion of the bending central axis of the elbow joint in the second virtual dividing member to form the second shape of the second dividing member.

[0014] According to the fourth characteristic configuration of the present invention, even if the part is the tapered tip portion of the first virtual dividing body, the second shape of the second dividing member and the first shape of the first dividing member are both less likely to be chipped and are more likely to maintain the heat insulation function.

[0015] The fifth characteristic configuration of the present invention is that the divided heat insulation members are each formed by dividing a plurality of them in the circumferential direction of the pipe.

[0016] According to the fifth characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first characteristic configuration of the present invention, the divided heat insulation members each formed by dividing a plurality of them in the circumferential direction of the pipe can easily cover the outside of the elbow joint even after two straight pipes and the elbow joint are connected to each other and piped, and heat insulation construction can be efficiently realized.

[0017] The sixth characteristic configuration of the present invention is that the one first dividing member is further divided into a plurality of parts by a cross-section along the direction of the bending central axis.

[0018] According to the sixth characteristic configuration of the present invention, by further dividing the one first dividing member into a plurality of parts as described above, the inner surface of the first space for accommodating the elbow joint can be approximated to a curved surface that more closely follows the bend of the elbow.

[0019] The seventh characteristic configuration of the present invention is that, among the plurality of the divided heat insulation members, a second space for accommodating a part of a straight pipe is provided in the member on the end side of the elbow.

[0020] According to the seventh characteristic configuration of the present invention, when forming an elbow heat insulating material for an elbow joint with a small radius of curvature, the thickness of the heat insulating material on the inner side of the bend of the elbow joint can be ensured together with the portion forming the second space for accommodating a part of the straight pipe, and heat insulation and heat preservation for the pipe can be made good.

[0021] The eighth characteristic configuration of the present invention is to position the central side surface on the bend central axis side of the first divided member at an intermediate portion between the outer bend boundary and the inner bend boundary of the first space when viewed in the bend central axis direction.

[0022] According to the eighth characteristic configuration of the present invention, for example, when forming an elbow heat insulating material for an elbow joint with a small radius of curvature, both the divided heat insulating member and the radius of curvature of the inner surface of the first space are small, and the tip side of the first divided member is even smaller. In contrast, with the above configuration, processing of the first divided member and the second divided member can be facilitated. Also, although the same applies to the fifth and sixth characteristics below, generation of sharp portions around the first space on the central side surface etc. of the first divided member can be prevented.

[0023] The ninth characteristic configuration of the present invention is that the central side surface on the bend central axis side of the first divided member is positioned outside the outer bend of the first space when viewed in the bend central axis direction.

[0024] According to the ninth characteristic configuration of the present invention, with the above configuration, the smaller and thinner the tapered tip portion is, the easier it is to prevent breakage during assembly of the first divided member.

[0025] The tenth characteristic configuration of the present invention is that the central side surface on the bend central axis side of the first divided member is positioned inside the inner bend of the first space when viewed in the bend central axis direction.

[0026] According to the tenth characteristic configuration of the present invention, for example, when forming an elbow heat insulating material for an elbow joint with a large radius of curvature, both the divided heat insulating member and the inner surface of the first space have a large radius of curvature, and the tip side of the first divided member is even larger. With the above configuration, the processing of the first divided member and the second divided member can be facilitated.

[0027] The eleventh characteristic configuration of the present invention is that the divided heat insulating member is selected from a foamed resin material and an inorganic porous material.

[0028] According to the eleventh characteristic configuration of the present invention, since the divided heat insulating member is selected from a foamed resin material and an inorganic porous material, a plurality of divided heat insulating members formed by dividing in the circumferential direction of the pipe can be easily formed by cutting out a cylindrical heat insulating material, and can be molded while maintaining a predetermined shape.

Brief Description of the Drawings

[0029]

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Mode for Carrying Out the Invention

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, parts denoted by the same reference numerals as those of the conventional example indicate the same or corresponding parts.

[0031] In FIGS. 1 to 3, for an elbow joint that connects the ends of two straight pipes 1 having the same outer diameter and intersecting axial centers in a fluid transport pipe provided in a building, a plant, etc., an elbow heat insulating material 3 that covers the outside thereof forms a first space 4 that can accommodate the elbow joint inside, and a divided heat insulating member 5 that is divided into a plurality in the bending direction of the elbow joint. As shown in FIGS. 4(a) and (b), an elbow heat insulating material 3 is shown that is formed by cutting out a plurality of heat insulating materials made of a ready-made cylindrical calcium silicate as a cement-based inorganic material.

[0032] First, as shown in FIG. 4(a), the elbow heat insulating material 3 assumes a plurality of virtual divided members 6', 7' having a substantially triangular shape when viewed in the direction of the bending central axis of the elbow joint. Next, as shown in FIGS. 4(a) and (b), the remaining portion 6b' after the tapered tip portion 6a', A of the bending central axis P of the elbow joint is separated from the first virtual divided member 6' is taken as the first shape 6f of the first divided member 6, and the separated tapered tip portion 6a', A is integrally connected to the tip side of the second virtual divided member 7' adjacent to the first virtual divided member 6' to form the second shape 7f of the second divided member 7.

[0033] Then, based on the first shape 6f of the first dividing member 6, as shown in FIGS. 4(b), 5(a), and 5(b), the first dividing member 6 is formed by cutting out a cylindrical heat insulating material. Also, based on the second shape 7f of the second dividing member 7, as shown in FIGS. 4(b), 5(a), and 5(b), the second dividing member 7 is formed by cutting out a cylindrical heat insulating material. The divided heat insulating member 5 is configured by adjacently arranging the first dividing member 6 and the second dividing member 7 with respect to each other.

[0034] In addition, the more the divided heat insulating member 5, which is divided into a plurality of parts in a cross section along the bending central axis P direction of the elbow joint (that is, with respect to the bending direction of the elbow joint), the closer the inner surface of the first space 4 can approach the curved surface along with the bending of the elbow.

[0035] The separation position of the tapered tip portion A will be described with reference to FIG. 4. In the case of the cutting line C1, the central side surface 6x on the central axis P side of the bending of the first dividing member 6 is located at the intermediate portion W1 between the outer bending boundary and the inner bending boundary of the first space 4 when viewed in the direction of the bending central axis P. In this case, the corner E1 of the central side surface 6x and the outer side surface 7x of the step portion of the second dividing member 7 is spared from forming a sharp portion. On the other hand, when the cutting line C2 is set at the outer bending boundary of the first space 4, a sharp portion E2 along the first space is generated on the outer side surface 7x2. Also, when the cutting line C3 is set at the inner bending boundary of the first space 4, a sharp portion E3 along the first space is generated on the central side surface 6x3.

[0036] The position where the central side surface 6x is provided is arbitrary. However, from the above-described situation, in order to prevent the generation of the sharp portions E2 and E3, it is preferable to provide the central side surface 6x within the ranges of the reference signs W1, W2, and W3 in FIG. 4 excluding the outer and inner bending boundaries of the first space 4.

[0037] [First Embodiment] The heat insulation of fluid piping is generally set by the required degree of heat insulation for the fluid flowing through the piping and the heat insulation performance of the heat insulating material. When the radius of curvature of the bent portion of the elbow joint is equal to or greater than the required thickness of the heat insulating material, as shown in FIGS. 1 to 3 (in this figure, the case where the required thickness of the heat insulating material is equal to the radius of curvature of the bent portion of the elbow joint is shown), the divided heat insulating member 5 divided into a plurality of sections in a cross section along the direction of the central axis P of the bend of the elbow joint is formed in a substantially fan shape in a side view. However, among the plurality of divided heat insulating members 5, in the first divided member 6 and the second divided member 7 adjacent to each other, as shown in FIG. 4, by shifting and connecting the tapered portion A between the adjacent virtual divided members, the tip sides in the side view of the plurality of divided heat insulating members 5 become thicker respectively and are less likely to be chipped.

[0038] [Second Embodiment] When the radius of curvature of the bent portion of the elbow joint is smaller than the required thickness of the heat insulating material, as shown in FIGS. 7 and 8, that is, in order to ensure the required thickness of the heat insulating material on the inner side in the bending direction, in the divided heat insulating member 5 covering the outer side of the elbow joint, portions at both ends in the bending direction are provided with portions for providing a second space 8 for accommodating a part of the straight pipe, and the tapered tip portion A of the adjacent divided heat insulating member 5 is integrally connected to that portion.

[0039] [Another Embodiment] Other embodiments will be described below. In the following other embodiments, the same members as those in the above embodiment are given the same reference numerals. 〈1〉 The elbow heat insulating material 3 may be formed not only from calcium silicate but also from inorganic porous materials such as perlite or from organic foamed resins such as rigid polyurethane foam, polyethylene foam, and phenolic foam. 〈2〉 The arrangement of the first and second divided members 6 and 7 in the divided heat insulating member 5 can be appropriately changed. For example, as shown in FIG. 6(a), the first divided members 6 and 6 may be adjacent to each other, or as shown in FIG. 6(b), the long sides of the second divided members 7 and 7 may be adjacent to each other. <3> The more the number of divisions of the divided heat insulating member 5 is divided into a plurality in the bending direction of the elbow joint, the closer the inner surface in the first space 4 approaches a smooth curved surface. For this purpose, as shown in FIGS. 7 and 8, even if one first divided member 6 with the tapered tip portion A separated is further divided into a plurality in the bending direction of the elbow joint 2, it may be. <4> The elbow joint does not necessarily have the same diameter as the straight pipe. As shown in FIGS. 9(a) and 9(b), it may be a welded pipe joint having a diameter different from that of the straight pipe. In addition to the straight pipes that intersect having the same diameter, they may have different diameters, and diameter conversion may be performed between the elbow joints.

[0040] In addition, as described above, reference numerals are marked for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by such entry. Needless to say, the present invention can be implemented in various modes without departing from the gist of the present invention.

Explanation of Reference Numerals

[0041] 1 Straight pipe 3 Elbow heat insulating material 4 First space 5 Divided heat insulating member 6 First divided member 7 Second divided member 8 Second space 6' First virtual divided member 7' Second virtual divided member 6a' Tapered tip portion 6b' Remaining portion 6f First shape, 7f Second shape A Tapered tip portion C1, C2, C3 Cutting lines P Bending central axis

Claims

1. An elbow heat insulating material that covers the outside of an elbow joint that connects the ends of two straight pipes whose axial centers intersect each other, forms a first space inside that can accommodate the elbow joint, and is provided with divided heat insulating members that are divided into a plurality in a cross-section along the bending central axis direction of the elbow joint. Assume a plurality of virtual divided members, and among the first virtual divided members whose shape in the direction of the bending central axis is substantially triangular, the remaining part with the tapered tip part of the bending central axis of the elbow joint cut off is taken as the first shape of the first divided member, and the cut-off tapered tip part is integrally connected to the second virtual divided member having a part adjacent to the first virtual divided member to form the second shape of the second divided member. The first divided member and the second divided member are formed by cutting out a cylindrical heat insulating material along the first shape and the second shape, and the divided heat insulating member is constituted by adjacently arranging the first divided member and the second divided member. An elbow heat insulating material.

2. The second virtual divided member also has a substantially triangular shape when viewed in the direction of the bending central axis, and the cut-off tapered tip part is integrally connected to the tapered tip part of the bending central axis of the elbow joint in the second virtual divided member to form the second shape of the second divided member. The elbow heat insulating material according to Claim 1.

3. An elbow heat insulating material that covers the outside of an elbow joint that connects the ends of two straight pipes whose axial centers intersect each other, forms a first space inside that can accommodate the elbow joint, and is provided with divided heat insulating members that are divided into a plurality in a cross-section along the bending central axis direction of the elbow joint. Assume a plurality of virtual divided members, A part of the adjacent first virtual divided member is integrally connected to the tapered tip part of the bending central axis of the elbow joint in the second virtual divided member whose shape in the direction of the bending central axis is substantially triangular to form the second shape of the second divided member. An elbow heat insulating material that constitutes the divided heat insulating member by taking the remaining part with the part cut off in the first virtual divided member as the first shape of the first divided member.

4. The first virtual dividing member also has a substantially triangular shape when viewed in the direction of the bending central axis, and the tapered tip portion of the first virtual dividing body, which is a separated part of the first virtual dividing member, is integrally connected to the tapered tip portion of the second virtual dividing member at the tapered tip of the bending central axis of the elbow joint to form the second shape of the second dividing member. The elbow heat insulating material according to claim 3.

5. The divided heat insulating members are each formed by dividing a plurality of them in the circumferential direction of the pipe. The elbow heat insulating material according to any one of claims 1 to 4.

6. The one first dividing member is further divided into a plurality of parts in a cross section along the direction of the bending central axis. The elbow heat insulating material according to any one of claims 1 to 4.

7. Among the plurality of divided heat insulating members, a second space for accommodating a part of the straight pipe is provided in the member on the end side of the elbow. The elbow heat insulating material according to any one of claims 1 to 4.

8. The central side surface of the first dividing member on the bending central axis side is positioned at an intermediate portion between the outer bending boundary and the inner bending boundary of the first space when viewed in the direction of the bending central axis. The elbow heat insulating material according to any one of claims 1 to 4.

9. The central side surface of the first dividing member on the bending central axis side is positioned outside the outer bending of the first space when viewed in the direction of the bending central axis. The elbow heat insulating material according to any one of claims 1 to 4.

10. The central side surface of the first dividing member on the bending central axis side is positioned inside the inner bending of the first space when viewed in the direction of the bending central axis. The elbow heat insulating material according to any one of claims 1 to 4.

11. The divided heat insulating member is selected from a foamed resin material and an inorganic porous material. The elbow heat insulating material according to any one of claims 1 to 4.

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