WO2019098319A1

WO2019098319A1 - Heat insulation structure for tubular pipe

Info

Publication number: WO2019098319A1
Application number: PCT/JP2018/042452
Authority: WO
Inventors: 隅田幸一; 千葉秀之; 吉村和彦
Original assignee: 大阪瓦斯株式会社; 旭興産株式会社; 日清紡ケミカル株式会社
Priority date: 2017-11-17
Filing date: 2018-11-16
Publication date: 2019-05-23
Also published as: JPWO2019098319A1; TW201932746A; AU2018369683A1; TWI787395B; JP7330464B2; PH12020550754A1; SG11202004804YA

Abstract

A heat insulation structure for a tubular pipe is provided with which a connection member can be mounted in a state in which the engagement with a heat insulation member is unlikely to detach, even when there is no space corresponding to the length of the connection member on one side location of the heat insulation member in the axial direction of the tubular pipe. On the outer circumferential part of the tubular pipe, a semicircular heat insulation member is provided in a state in which an adjacent pair of heat insulation member end parts are connected to a pair of elongated connection members along the axial direction of the tubular pipe, the cross-sectional shape of the connection member on one side being formed in a configuration comprising a body part that engages with cutoff sections of the pair of heat insulation member end parts, and a pair of engagement projections that engage with engagement recessed sections at the top of the body part, and the cross-sectional shape of the connection member on the other side being formed in a configuration having flat surfaces along the inner surfaces and the outer surfaces of the recessed sections of the pair of heat insulation member end parts.

Description

Thermal insulation structure for cylindrical tubes

In the present invention, the semicircular heat insulating members divided into two in the circumferential direction of the cylindrical tube are attached to the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, in the circumferential direction of the cylindrical tube The present invention relates to a heat insulating structure for a cylindrical pipe provided in such a manner as to connect an end portion of a pair of heat insulating members adjacent to each other at the two opposing points located along the axial center direction of the cylindrical pipe with a long connecting member.

The heat insulation structure for a cylindrical tube is to thermally insulate the cylindrical tube by covering the outer peripheral portion of the cylindrical tube through which the low temperature fluid such as LNG or LPG flows with a heat insulating member. Usually, the outer peripheral portion of the cylindrical tube is The heat insulating member covers a plurality of layers (for example, two or three layers).
In the case where the cylindrical tube is covered in a plurality of layers, heat insulating members having different diameters are provided in a concentrically stacked state.

As a conventional example of the heat insulation structure for cylindrical tubes, as a groove-like engaging portion in which the connection member is engaged with each of the pair of heat insulation member ends connected by the connection member A recessed groove portion recessed in the circumferential direction is formed in a form including a locking groove portion recessed outward in the radial direction of the cylindrical tube on the radially outer side portion of the cylindrical tube of the recessed groove portion, and the connecting member However, there is one formed in a form including a main body connecting portion engaged with the respective recessed groove portions of the pair of heat insulating member end portions and a pair of locking connecting portions engaged with the locking groove portion. (See, for example, Patent Document 1).

JP, 2016-194368, A

The cylindrical tube is generally formed in a state provided with a connecting flange portion at both ends, and by connecting a plurality of cylindrical tubes by flange connection, a flow path for flowing the low temperature fluid will be formed, and In some cases, a connecting flange portion of a cylindrical pipe is connected to a valve such as an open / close valve.
And, when the heat insulating member is attached to the outer peripheral portion of the cylindrical tube, the heat insulating member having a predetermined length in the axial center direction of the cylindrical tube is sequentially attached from one end to the other end of the cylindrical tube. Become.

That is, in a state where the semicircular heat insulating members divided into two in the circumferential direction of the cylindrical tube are arranged in the circumferential direction of the cylindrical tube in a state where the end faces are abutted at a location adjacent to one end of the cylindrical tube While moving the long connecting member in the longitudinal direction, engage (insert) in the recessed groove formed in each of the pair of heat insulating member ends, mount the heat insulating member, and then complete the mounting The semicircular heat insulating members divided into two in the circumferential direction of the cylindrical tube are arranged in the circumferential direction of the cylindrical tube in a state in which the end faces are abutted at a location adjacent to Attaching the heat insulating member by engaging (inserting) in the recessed groove formed in each of the pair of heat insulating member ends while moving the connecting member in the longitudinal direction, from one end to the other end of the cylindrical tube It will be done sequentially.

However, when the heat insulating member is sequentially attached from one end to the other end of the cylindrical tube and finally the heat insulating member is attached to a location adjacent to the other end of the cylindrical tube, the other end of the cylindrical tube Since the flange of the part closes the recessed groove formed in each of the pair of heat insulating member ends, the flange part becomes an obstacle and the pair of heat insulation is moved while moving the long connecting member in the longitudinal direction. It can not be engaged (inserted) in the recess grooves formed in each of the member end portions.

That is, while moving the long connection member in the longitudinal direction, in order to engage (insert) the recessed groove portions formed in each of the pair of heat insulating member ends, one of the axial directions of the cylindrical tube in the heat insulating member A space corresponding to the length of the connecting member is required at the side location, but in the case where the heat insulating member is attached to the location adjacent to the other end of the cylindrical tube, the length of the connecting member for the flange It is impossible to secure a space equivalent to

By the way, a gap is formed between the flange at the other end of the cylindrical tube and the heat insulating member, and while the long connecting member is bent, it engages with the concave groove formed in each of the pair of heat insulating member ends. Although it is conceivable to perform (insertion), in this case, there is a possibility that the long connection member may be broken and it can not be engaged (inserted) in the recessed groove portion.

Therefore, as shown in FIG. 17 and FIG. 18, each of the end portions of the pair of heat insulating members at the positions where the end faces of the semicircular heat insulating members P divided into two in the circumferential direction of the cylindrical tube 1 are opposed It is conceivable to form a stepped fitting portion Z which has a step-like shape along the radial direction of the pipe 1. Incidentally, FIGS. 17 and 18 illustrate the case where the heat insulating members are mounted in three layers.

However, in this case, the number of types of the heat insulating member P including the step-like fitting portion Z increases, so that manufacturing and management become complicated, and the step-like fitting portion Z of the pair of heat insulating member ends is fitted. Even if they are fitted together, the fitting is apt to come off, and there is a disadvantage that it is difficult to mount the heat insulating member P well.
That is, since the step-like fitting portions Z at the ends of the pair of heat insulating members basically hold the fitting state by the frictional force in the fitted state, the fitting is easy to be detached It is.

The present invention has been made in view of the above-described circumstances, and an object thereof is to connect even if there is no space corresponding to the length of the connecting member at one side of the heat insulating member in the axial direction of the cylindrical tube. Another object of the present invention is to provide a heat insulating structure for a cylindrical tube which can be mounted in such a manner that the member can not be easily disengaged from the heat insulating member.

In the heat insulation structure for a cylindrical pipe according to the present invention, the cylindrical body in a state in which the semicircular heat insulation members divided into two in the circumferential direction of the cylindrical pipe abut each other on the outer periphery of the cylindrical pipe through which low temperature fluid flows. In each of two opposing locations located in the circumferential direction of the pipe, the ends of the pair of heat insulating members adjacent to each other are connected by an elongated connecting member along the axial center direction of the cylindrical pipe. Yes, its feature structure is
A radial engagement of the cylindrical tube at the end of the heat insulating member as a groove-like engaging portion in which the connecting member is engaged with each of the pair of heat insulating member ends at one side of the two opposing points The cut part which cut off the inner side part in the circumference along the circumferential direction of the cylindrical pipe is a lock which concaves radially outward of the cylindrical pipe in the radial direction outer side of the cylindrical pipe of the cut part. It is formed in the form provided with the recessed part for
The connecting member at one side of the two opposite places has a main body that engages with the cut-out portion of the pair of heat insulating member ends and a pair that engages with the locking recess. And a locking projection of the
As a groove-like engaging portion in which the connecting member is engaged with each of the pair of heat insulating member ends on the other side of the two opposing places, along the tangential direction of the cylindrical pipe from the end face The recessed portion to be recessed is formed in a form in which each of the inner side surface and the outer side surface aligned along the radial direction of the cylindrical tube is a flat surface along the tangential direction of the cylindrical tube,
The connecting member at the other side of the two opposing places is formed in a shape having a flat surface along the inner side surface and the outer side surface of each of the recessed portions of the pair of heat insulating member ends. The point is.

In addition, the tangential direction of the above-mentioned cylindrical pipe is the tangential direction of the cylindrical pipe in the opposing location located in the state with which the end surface of a pair of heat insulation members was put together.

That is, in a state where the end faces of the heat insulating members divided into two are put together, in each of two opposing locations located in the circumferential direction of the cylindrical tube, a pair of adjacent heat insulating member ends are connected by the connecting member For example, the following procedure can be performed.
First, each of the engaging portions formed at both ends of the heat insulating member on one side of the pair of semicircular paired heat insulating members has a connecting member having a main body and a locking projection and a flat surface Engage the shape connecting member. By the way, the connecting member having the main body and the locking projection engages with the engaging portion formed as the cutout having the locking recess, and the connecting member having a flat surface is a cylindrical tube from the end face It engages with the engaging part formed as a concave part which dents in a tangential direction.

Thereafter, the heat insulating member on one side engaged with the connecting member having the main body portion and the locking convex portion and the connecting member having a flat surface is attached to the outer peripheral portion of the cylindrical tube.
Subsequently, first, an engaging portion formed on one end side of the heat insulating member on the other side with respect to the connecting member including the main body portion and the locking convex portion, that is, a cutting portion including the locking concave portion The engaging portion is engaged while being moved in a direction to approach the cylindrical tube from a position corresponding to the outside of the cylindrical tube.

Next, with respect to the connecting member having a flat surface, the engaging portion formed on the other end side of the heat insulating member on the other side, that is, formed as a recessed portion recessed from the end face in the tangential direction of the cylindrical pipe The engaged portions are engaged while being moved in the tangential direction of the cylindrical tube at the opposing location located in a state where the end faces of the pair of heat insulating members abut.

In such a procedure, in a state where the end faces of the heat insulating members divided into two are abutted, in each of two opposing locations located in the circumferential direction of the cylindrical tube, a pair of adjacent heat insulating member ends are connected By connecting the connecting members, the connecting member can be mounted even if there is no space corresponding to the length of the connecting member at one side of the heat insulating member in the axial direction of the cylindrical tube.

In addition, in a state in which the engaging portion formed as the cut-out portion including the locking recess is engaged with the connection member including the main body portion and the locking protrusion, the locking protrusion is the locking recess The engagement between the connecting member including the main body portion and the engagement convex portion and the engagement portion is difficult to be released.
Further, in a state in which an engaging portion formed as a recessed portion recessed from the end face in the tangential direction of the cylindrical tube is engaged with the connecting member having a flat surface, for example, the heat insulating member is a main body Even if it is intended to rotate about the engagement point with the connecting member having the locking projection, the concave portion is formed along a radial direction of the cylindrical tube and formed in a flat surface along the tangential direction of the cylindrical tube. The flat surface along the inner surface and the outer surface of the recess in the connecting member having a flat surface is brought into contact with the side surface and the outer surface, thereby preventing its rotational movement, etc. The engagement between the connecting member having the surface and the engaging portion is not easily released.

In summary, according to the heat insulation structure for cylindrical tubes of the present invention, even if there is no space corresponding to the length of the connection member at one side of the heat insulation member in the axial direction of the cylindrical tube, the connection member is engaged with the heat insulation member. It can be worn in a state where it is hard to come off.

In the heat insulation structure for a cylindrical pipe according to the present invention, the cylindrical body in a state in which the semicircular heat insulation members divided into two in the circumferential direction of the cylindrical pipe abut each other on the outer periphery of the cylindrical pipe through which low temperature fluid flows. In each of two opposing locations located in the circumferential direction of the pipe, the ends of the pair of heat insulating members adjacent to each other are connected by an elongated connecting member along the axial center direction of the cylindrical pipe. Yes, its feature structure is
A radially inward portion of the cylindrical member of the heat insulating member end portion is formed as a groove-shaped engaging portion engaged with the connecting member at each of the pair of heat insulating member ends at the two opposing locations. According to an aspect of the present invention, the cutting portion cut along the circumferential direction of the cylindrical pipe includes a locking recess that is recessed radially outward of the cylindrical pipe on the radially outer side portion of the cylindrical pipe of the cutting portion. Formed
The connecting member at the two opposing locations includes a main body portion which engages with the cut-out portion of the pair of heat insulating member end portions and a pair of locking convex portions which engages with the locking concave portion. In the form provided with the

That is, in a state where the end faces of the heat insulating members divided into two are put together, in each of two opposing locations located in the circumferential direction of the cylindrical tube, a pair of adjacent heat insulating member ends are connected by the connecting member For example, the following procedure can be performed.
First, a connecting member having a main body portion and a locking projection is engaged with each of the engaging portions formed at both end portions of the heat insulating member on one side of the pair of semicircular shaped heat insulating members divided into two.

Thereafter, the heat insulating member on one side in which the connecting member including the main body portion and the locking convex portion is engaged with the both end portions is mounted on the outer peripheral portion of the cylindrical tube.
Subsequently, first, with respect to one of the pair of connection members having the main body portion and the locking convex portion, the engaging portion formed on one end side of the heat insulating member on the other side, that is, the cutting including the locking concave portion The engaging portion, which is formed as a portion, is engaged while being moved in a direction to approach the cylindrical tube from a location corresponding to the outside of the cylindrical tube.

Next, with respect to the other of the pair of connecting members having the main body portion and the locking convex portion, an engaging portion formed on the other end side of the heat insulating member on the other side, that is, a cutting portion including the locking concave portion The engaging portion formed as is engaged while being moved in a direction to approach the cylindrical pipe from a location corresponding to the outside of the cylindrical pipe.

By the way, when moving the engaging part formed on the other end side of the other side heat insulation member from the location corresponding to the outside of the cylindrical pipe in the direction to approach the cylindrical pipe, the other side heat insulation member Since the elastic deformation is performed so as to be expanded and contracted along the radial direction of the cylindrical tube, it is advantageous when the diameter of the heat insulating member is larger than the height of the locking convex portion.

In addition, in a state in which the engaging portion formed as the cut-out portion including the locking recess is engaged with the connection member including the main body portion and the locking protrusion, the locking protrusion is the locking recess The engagement between the connecting member including the main body portion and the engagement convex portion and the engagement portion is difficult to be released.

In the heat insulation structure for a cylindrical pipe according to the present invention, the cylindrical body in a state in which the semicircular heat insulation members divided into two in the circumferential direction of the cylindrical pipe abut each other on the outer periphery of the cylindrical pipe through which low temperature fluid flows. In each of two opposing locations located in the circumferential direction of the pipe, the ends of the pair of heat insulating members adjacent to each other are connected by an elongated connecting member along the axial center direction of the cylindrical pipe. Yes, its feature structure is
A groove-shaped engaging portion engaged with the connecting member at each of the pair of heat insulating member end portions at the two opposing locations is a recessed portion recessed along the tangential direction of the cylindrical pipe from the end surface The inner surface and the outer surface aligned along the radial direction of the cylindrical tube are formed as flat surfaces along the tangential direction of the cylindrical tube,
The connecting members at the two opposing points are formed in a shape having a flat surface along the inner side surface and the outer side surface of the respective recessed portions of the pair of heat insulating member end portions.

That is, in a state where the end faces of the heat insulating members divided into two are put together, in each of two opposing locations located in the circumferential direction of the cylindrical tube, a pair of adjacent heat insulating member ends are connected by the connecting member For example, the following procedure can be performed.
First, a connecting member having a flat surface is engaged with each of the engaging portions formed on both end portions of the heat insulating member on one side of the pair of semicircular paired heat insulating members.

Thereafter, the heat insulating member on one side in which the connecting member having a flat surface is engaged with both ends is mounted on the outer peripheral portion of the cylindrical tube.
Subsequently, the heat insulating member on the other side is moved so as to approach the cylindrical pipe, and the heat insulating member on the other side is connected to the connecting member having a flat surface engaged with both ends of the heat insulating member on one side. The positions where the end faces of the pair of heat insulating members are engaged, with the engaging parts formed at both ends of the member, that is, the engaging parts formed as recessed parts recessed from the end face in the tangential direction of the cylindrical pipe. While moving in the tangential direction of the cylindrical tube at the opposite position.

Moreover, in a state in which the engaging portion formed as a recessed portion recessed from the end face in the tangential direction of the cylindrical tube is engaged with the connecting member having a flat surface, for example, the heat insulating member is on one side Of the inner surface and the outer surface formed in a flat surface along the radial direction of the cylindrical tube of the recessed portion and along the tangential direction of the cylindrical tube, even if it is intended to rotationally move about the engagement point with the connection member In the connection member having a flat surface, the flat surface along the inner surface and the outer surface of the recess abuts against each other, thereby preventing its rotational movement, etc. The engagement between the member and the engaging portion is difficult to remove.

According to a further characterizing feature of the heat insulation structure for a cylindrical tube of the present invention, the connecting member formed into a shape having a flat surface is formed of an elastically deformable material, and engages with the adjacent recess in the connecting member. The engagement portion on one side of the pair of engagement portions is formed with a slit that separates the engagement portions in the radial direction of the cylindrical tube.

That is, a slit that separates the engaging portion in the radial direction of the cylindrical tube in the engaging portion on one side of the pair of engaging portions engaged with the adjacent recessed portions in the connecting member formed in a shape having a flat surface For example, the engaging portion in which the slit is not formed in the pair of engaging portions in the connecting member is engaged with the engaging portion of the heat insulating member to be attached first of the pair of heat insulating members. The engagement portion of the heat insulating member to be attached later of the pair of heat insulating members is engaged with the engaging portion in which the slit is formed in the pair of engaging portions of the connecting member. By doing this, it is possible to satisfactorily engage the engaging portion with the engaging portion while elastically deforming the engaging portion in which the slit is formed.

That is, when the engaging portion in which the slit is formed is pressed so as to be pinched in the radial direction, the slit can be formed to reduce the width along the radial direction of the cylindrical tube. Engaging the engaging portion of the heat insulating member with the engaging portion is good while elastically deforming the engaging portion in which the slit is formed so as to reduce the width along the radial direction of the cylindrical tube. be able to.

By the way, the width along the radial direction of the cylindrical tube of the engaging portion in which the slit is formed is formed to be slightly larger than the width between the inner surface and the outer surface of the recess forming the engaging portion. Therefore, when the engaging portion of the heat insulating member is engaged with the engaging portion in which the slit is formed, the inner side surface and the outer side surface of the recessed portion forming the engaging portion are engaged with the slit The contact pressure with the joint portion can be increased to make it difficult to separate.

In short, according to the further characterizing feature of the heat insulating structure for cylindrical tubes of the present invention, the engaging portion of the heat insulating member to be attached later of the pair of heat insulating members is formed with the slit of the pair of engaging portions in the connecting member Engaging the engaged portion can be performed well.

According to a further characterizing feature of the heat insulation structure for a cylindrical tube of the present invention, the connecting member formed into a shape having a flat surface is formed of an elastically deformable material, and engages with the adjacent recess in the connecting member. Each of the pair of engaging portions is formed with a slit that separates the engaging portions in the radial direction of the cylindrical tube.

That is, in each of the pair of engaging portions engaged with the adjacent recessed portions in the connecting member formed in a shape having a flat surface, slits for separating the engaging portions in the radial direction of the cylindrical tube are formed Then, engaging one engaging portion of the pair of engaging portions in the connecting member with the engaging portion of the heat insulating member to be attached first of the pair of heat insulating members, or after the pair of heat insulating members The engagement portion of the heat insulating member to be attached can be favorably engaged with the remaining engagement portion of the pair of engagement portions in the connection member.

By the way, the width along the radial direction of the cylindrical tube of the engaging part where the slit is formed is formed slightly larger than the width between the inner surface and the outer surface of the recessed part which forms the engaging part When the engaging portion of the heat insulating member is engaged with the engaging portion in which the slit is formed, the slit is formed with the inner side surface and the outer side surface of the recess forming the engaging portion The contact pressure with the part can be increased to make it difficult to separate.

In short, according to the further characterizing feature of the heat insulation structure for cylindrical tubes of the present invention, it is possible to satisfactorily engage the engagement portion of the heat insulation member with the pair of engagement portions in the connection member.

A further characterizing feature of the heat insulation structure for a cylindrical tube according to the present invention is a plurality of heat insulation formed in a cylindrical shape with different diameters by the semi-circular heat insulation members divided into two on the outer peripheral portion of the cylindrical pipe. The wall is provided in the form of forming a plurality of layers.

That is, since the outer peripheral portion of the cylindrical tube is covered with a plurality of heat insulating walls provided in a state of forming a plurality of layers, the cylindrical tube can be appropriately insulated.

In short, according to the further feature configuration of the heat insulation structure for cylindrical tubes of the present invention, the cylindrical tubes can be properly insulated.

A further characterizing feature of the heat insulation structure for a cylindrical tube according to the present invention is that the installation location of the semicircular heat insulation member connected by the connection member at the outer peripheral portion of the cylindrical tube is adjacent in the axial direction of the cylindrical pipe. A pair of arc-shaped heat insulating members divided into a plurality in the circumferential direction of the cylindrical tube at a location, in a state in which the end faces are put together, in each of a plurality of opposing locations positioned in the circumferential direction of the cylindrical tube The ends of the heat insulating members are connected by an elongated connecting member along the axial direction of the cylindrical tube,
A recessed groove portion recessed in the circumferential direction of the cylindrical pipe from the end surface as an engaging groove portion of the connection member is provided in each of the pair of heat insulating member end portions connected by the connection member, the recessed groove portion A radially outer side portion of the cylindrical tube, and a locking groove recessed outward in the radial direction of the cylindrical tube;
In the embodiment, the connecting member includes a main body connecting portion engaged with the recessed groove portion of each of the pair of heat insulating member ends and a pair of locking connecting portions engaged with the locking groove portion. It is in the point where it is formed.

That is, when the heat insulating member having a predetermined length in the axial direction of the cylindrical tube is sequentially attached from one end to the other end of the cylindrical tube, a portion adjacent to the one end of the cylindrical tube or At the place away from the other end, the arc-shaped heat insulating member connected by the connecting member is attached, and finally, at the place adjacent to the other end of the cylindrical tube, it is connected by the connecting member By mounting the semicircular heat insulating member, the heat insulating member can be properly mounted over the entire length of the cylindrical tube.

By the way, in order to attach the arc-shaped heat insulation member connected by the long connection member to the outer peripheral part of the cylindrical pipe, the arc-shaped heat insulation members divided in the circumferential direction of the cylindrical pipe are attached with end faces Engaging (inserting) in the engaging groove formed in each of the heat insulating member end portions adjacent to each other while moving the long connecting member in the longitudinal direction in a state where they are aligned in the circumferential direction of the cylindrical tube in a combined state As a result, the heat insulating member is attached.

Then, as the engaging groove portion formed in each of the heat insulating member end portions connected by the connecting member, the recessed groove portion recessed from the end face of the heat insulating member in the circumferential direction of the cylindrical tube is the cylinder of the recessed groove portion A locking groove is formed on the radially outer side of the pipe and recessed outward in the radial direction of the cylindrical pipe, and in accordance with this, the connecting member has a cross-sectional shape corresponding to each of the heat insulating member ends. Since it is formed in the form provided with the main body connecting portion engaged with the recessed groove portion and the pair of locking connecting portions engaged with the locking groove portion, the locking groove portion is locked by the locking connecting portion Therefore, when the heat insulating member is cooled by the low temperature fluid flowing through the inside of the cylindrical tube, the heat shrinking of the heat insulating member allows the adjacent heat insulating members to be properly connected. The cylindrical tube can be properly insulated by suppressing the appearance of a large gap at the same time.

In short, according to the further characterizing feature of the heat insulating structure for cylindrical tubes of the present invention, the heat insulating member can be properly mounted over the entire length of the cylindrical tubes in a state where the cylindrical tubes can be properly heat insulated.

A further characterizing feature of the heat insulation structure for a cylindrical tube according to the present invention is that the plurality of circular arc-shaped heat insulation members connected by the connection member are formed in a cylindrical shape with different diameters on the outer peripheral portion of the cylindrical pipe. A plurality of heat insulation wall portions are provided in a state of forming a plurality of layers.

That is, in a state in which a plurality of heat insulating wall portions formed in a cylindrical shape and having different diameters by the arc-shaped heat insulating members connected by the connecting member form a plurality of layers on the outer peripheral portion of the cylindrical pipe Because it is provided, the cylindrical tube can be insulated more properly.

In short, according to the further feature configuration of the heat insulation structure for cylindrical tubes of the present invention, the cylindrical tubes can be insulated more properly.

These are longitudinal side views which show the mounting state of a heat insulation member. Fig. 7 is a cutaway perspective view showing a mounted state of the heat insulating member and the semicircular heat insulating member. FIG. 3 is a view taken along line III-III in FIG. FIG. 4 is a view taken along the line IV-IV in FIG. These are exploded perspective views which show the relationship between a connection member and a heat insulation member. These are front views which show the relationship between a connection member and a semicircular heat insulation member. Is a perspective view of a connection member. These are perspective views which show the mounting form of a connection body. FIG. 7 is an enlarged perspective view of a connector. These are front views which show the installation form of the semicircle-shaped heat insulating material of 2nd Embodiment. These are perspective views which show the connection member of 2nd Embodiment. These are front views which show the installation form of the heat insulation member of 3rd Embodiment. These are front views which show the relationship between the semicircular heat insulation member of 3rd Embodiment, and a connection member. These are front views which show the installation form of the semicircle-shaped heat insulation member of 3rd Embodiment. These are perspective views which show the connection member of 3rd Embodiment. These are front views which show the installation form of the semicircle-shaped heat insulation member of 4th Embodiment. These are front views which show the installation form of the heat insulation member of a comparative example. These are the disassembled perspective views which show the installation form of the heat insulation member of a comparative example.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
(Whole structure of heat insulation structure)
As shown in FIGS. 1 and 2, a cylindrical tube 1 through which a low temperature fluid such as LNG or LPG flows is provided, and a plurality of heat insulating members made of urethane foam are formed around the cylindrical tube 1 by foaming urethane resin. P are mounted in a state in which they are aligned in the circumferential direction and axial direction of the cylindrical tube 1.

The plurality of heat insulating members P extend in a circular arc shape (semicircular shape in the present embodiment) along the circumferential direction of the cylindrical tube 1 in a state of having a constant thickness in the radial direction of the cylindrical tube 1 The base material formed in a long shape in which the axial direction length is long is cut into a predetermined length in the axial direction of the cylindrical tube 1.
As shown in FIG. 5, in the following description, the radially outer surface of the heat insulating member P is the outer surface 3, the radially inner surface is the inner surface 4, and the end surfaces in the circumferential direction are end surfaces. Let 5 be the side surface 6 on both sides in the axial direction.

In the present embodiment, the heat insulating member P is mounted so as to form a three-layered heat insulating wall.
That is, as the heat insulation member P, the largest diameter large diameter heat insulation member PL, the middle diameter middle diameter heat insulation member PM, and the smallest diameter small diameter heat insulation member PS are provided (see FIGS. 3 and 4).
Incidentally, in the state where the heat insulating members P are laminated, the outer surface 3 of the large diameter heat insulating member PL is located on the outermost side, and the inner surface 4 of the large diameter heat insulating member PL and the outer surface 3 of the intermediate diameter heat insulating member PM have the same diameter. The inner surface 4 of the intermediate diameter heat insulating member PM and the outer surface 3 of the small diameter heat insulating member PS are arranged in the same diameter, and the inner surface 4 of the small diameter heat insulating member PS is arranged in the same diameter as the outer peripheral surface of the cylindrical tube 1 become.

Flanges F are provided at both ends of the cylindrical tube 1, and the flanges F of the adjacent cylindrical tubes 1 are connected using bolts to form a flow path for flowing the low temperature fluid.
The plurality of heat insulating members P are sequentially mounted from one end to the other end of the cylindrical tube 1, a location adjacent to one end of the cylindrical tube 1, a location adjacent to the other end of the cylindrical tube 1, And, it will be attached to the corresponding place between them.

The mode in which the heat insulating members P are arranged in the axial center direction of the cylindrical tube 1 is the same as the mode in which the small diameter heat insulating members PS having the smallest diameter are arranged and the large diameter heat insulating members PL having the largest diameter are arranged. The form in which the intermediate diameter heat insulation members PM are arranged is different.
That is, the small diameter heat insulating member PS, the intermediate diameter heat insulating member PM, and the large diameter heat insulating member PL are formed such that the length along the axial center direction of the cylindrical tube 1 is a basic length (for example, 1 m).

And about small diameter heat insulation member PS and large diameter heat insulation member PL, while heat insulation members P of basic length are arranged from one end of cylindrical tube 1 toward the other end, about middle diameter heat insulation member PM, After arranging the heat insulating member P having a length of half the basic length (for example, 0.5 m) at one end of the cylindrical tube 1, the heat insulating member P having a basic length is moved toward the other end of the cylindrical tube 1 It is configured to line up.

At a location adjacent to the other end of the cylindrical tube 1, the lengths in the axial direction of the small diameter heat insulating member PS, the intermediate diameter heat insulating member PM and the large diameter heat insulating member PL are the lengths in the axial direction of the cylindrical tube 1. It will be determined appropriately as well.
However, the space in the axial direction of the small diameter heat insulating member PS, the medium diameter heat insulating member PM, and the large diameter heat insulating member PL attached to the location adjacent to the other end of the cylindrical tube 1 To form a length of 1 m or more.

Further, for the intermediate diameter heat insulating member PM, in order to install the intermediate diameter heat insulating member PM having a half (for example, 0.5 m) length of the basic length adjacent to one end of the cylindrical tube 1, the cylindrical tube 1 The axial length of the small diameter heat insulating member PS and the large diameter heat insulating member PL is different from the axial length of the intermediate diameter heat insulating member PM at a location adjacent to the other end of the small diameter heat insulating member PS.
In the present embodiment, the axial length of the intermediate diameter heat insulating member PM is half of the basic length (e.g., 0.5 m) as the axial length of the small diameter heat insulating member PS and the large diameter heat insulating member PL. The length is added.

Furthermore, a configuration in which the heat insulating members P are arranged in the circumferential direction of the cylindrical tube 1 and mounted at a location adjacent to one end of the cylindrical tube 1 and at an intermediate location excluding the location adjacent to the other end of the cylindrical tube 1 Although the mounting configuration and abbreviation are the same, the configuration (hereinafter referred to as end mounting configuration and abbreviation) in which the heat insulating members P are arranged in the circumferential direction of the cylindrical tube 1 at a location adjacent to the other end of the cylindrical tube 1 is Unlike the basic mounting configuration, the basic mounting configuration and the end mounting configuration will be sequentially described next.

Incidentally, a heat insulating material D such as glass wool is filled in a portion between the flange F of the cylindrical tube 1 and the heat insulating member P, and a portion corresponding to the upper portion of the flange F of the cylindrical tube 1 is basically mounted. In the same configuration as the above, the arc-shaped flange heat insulating member Q is installed in two layers.

(Basic installation configuration)
In the basic mounting configuration, as shown in FIG. 3, arc-shaped (in the present embodiment, semicircular) heat insulating members P divided into a plurality of pieces in the circumferential direction of the cylindrical tube 1 are in a state where their end faces are butted. In each of a plurality of opposing locations located in the circumferential direction of the cylindrical tube 1, adjacent pairs of heat insulating member ends are connected by an elongated connecting member 7 (see FIG. 5) along the axial center direction of the cylindrical tube. It is provided in the outer peripheral part of the cylindrical pipe 1 in the state.
By the way, the length of the connecting member 7 is formed to be the same length as the length in the axial center direction of the heat insulating member P, and the connecting member 7 is made of urethane resin similarly to the heat insulating member P.

As shown in FIGS. 3 and 5, in each of a pair of heat insulating member end portions connected by the connecting member 7, as the engaging groove portion U of the connecting member 7, recessed from the end face in the circumferential direction of the cylindrical pipe The recessed groove portion 8 is formed in a form provided with a locking groove portion 8 a which is recessed outward in the radial direction of the cylindrical tube 1 on the radially outer side portion of the cylindrical tube 1 of the recessed groove portion 8.

Then, the connecting member 7 includes a main body connecting portion 7A which engages in the recessed groove portion 8 of the pair of heat insulating member ends and a pair of locking connecting portions 7a which engages in the locking groove portion 8a. It is formed in the form provided.

Therefore, in the basic mounting configuration, in the state where the semicircular heat insulating members P are arranged in the circumferential direction of the cylindrical tube 1 at the outer peripheral portion of the cylindrical tube 1, the connecting member 7 is longitudinal (the axial direction of the cylindrical tube 1 ), And the heat insulation member P is attached to the outer peripheral portion of the cylindrical tube 1 by inserting the heat insulation member P into engagement with the respective recessed groove portions 8 of the pair of heat insulation member ends (FIG. 5) reference).

Specifically, first, the small diameter heat insulating member PS is attached to the outer peripheral surface of the cylindrical tube 1, then, the intermediate diameter heat insulating member PM is attached to the outer peripheral surface of the small diameter heat insulating member PS, and finally, the large diameter heat insulating member PL is attached. The intermediate diameter heat insulating member PM is mounted on the outer peripheral surface.
As described above, in the state where the small diameter heat insulating member PS, the intermediate diameter heat insulating member PM, and the large diameter heat insulating member PL are mounted, a plurality of arc shapes (two arcs) connected by the connecting member 7 to the outer peripheral portion of the cylindrical tube 1 A plurality of (three) heat insulating wall portions formed in a cylindrical shape and having different diameters by the semicircular heat insulating member P are provided in a state of forming a plurality of layers.

In addition, if the facing locations of the small diameter heat insulating member PS with the end surfaces being in contact with each other and the facing locations of the intermediate diameter heat insulating member PM with the end surfaces in the bottom surface of the small diameter heat insulating member PM differ in phase by 90 degrees in the circumferential direction of the cylindrical tube 1 Similarly, the phase in the circumferential direction of the cylindrical tube 1 is the opposing location where the end faces of the medium diameter heat insulating member PM are in contact with each other and the opposing location of the state where the end surfaces of the large diameter heat insulating member PL are in contact with each other. The small diameter heat insulating member PS, the intermediate diameter heat insulating member PM, and the large diameter heat insulating member PL are mounted in a configuration in which the angle .alpha.

(End attachment configuration)
In the end mounting configuration, as shown in FIG. 4, the semicircular heat insulating member P divided into two in the circumferential direction of the cylindrical tube 1 described above is divided into two in the circumferential direction of the cylindrical tube 1. It will be used as heat insulation member PA.
Then, in each of two opposing locations located in the circumferential direction of the cylindrical tube 1 with the heat insulating member P in a state where the end faces are joined to each other, the end portions of the adjacent heat insulating member along the axial center direction of the cylindrical tube It is provided in the outer peripheral part of the cylindrical tube 1 in the state connected with the elongate connection member B. As shown in FIG.
Incidentally, the length of the connecting member B is formed to be the same length as the length in the axial center direction of the heat insulating member P, and the connecting member B is made of urethane resin similarly to the heat insulating member P.

A recessed portion recessed along the tangential direction of the cylindrical pipe 1 from the end face 5 as a groove-shaped engaging portion V engaged with the connecting member B at each of the pair of heat insulating member ends at the two opposing positions described above 10 are formed in the form which makes each of the inner surface 10 u and the outer surface 10 g which line up along the radial direction of the cylindrical tube 1 the flat surface in alignment with the tangential direction of the cylindrical tube 1.
In addition, the tangential direction of the cylindrical pipe 1 in this description means the tangential direction of the cylindrical pipe 1 in the opposing location located in the state with which the end surface 5 of a pair of heat insulation members P was put together.

Further, as shown by phantom lines in FIG. 6, the recess 10 is formed by cutting off the side portion 8b located on the side of the locking groove 8a in the recess 8 in the basic mounting configuration. .
That is, in the present embodiment, the heat insulating member P having the recessed groove portion 8 is formed, and in the basic mounting form, the heat insulating member P is used as it is, and in the end portion mounting configuration, the heat insulating member P is The heat insulating member P in which the recessed portion 10 is formed by cutting out the side portion 8b located on the side of the locking groove 8a to form a square shaped recessed portion 10 is a semicircular heat insulating member It will be used as PA.

Then, the connecting members B at two opposing locations are formed in a rectangular shape in a cross-sectional shape having flat surfaces along the inner side surface 10 u and the outer side surface 10 g of the respective recessed portions 10 of the pair of heat insulating member end portions. It is configured as a long rectangular body 11.
Incidentally, since the corner portion of the rectangular recess 10 is formed in an arc shape, the cross-sectional shape of the long rectangular body 11 is, in detail, a rounded corner shape.

Further, in the present embodiment, the elongated rectangular body 11 having a rectangular cross-sectional shape is formed of a material (urethane resin) that can be elastically deformed, and the adjacent concave portion 10 in the elongated rectangular body 11 is formed. As shown in FIG. 7, slits 12 for separating the engaging portion 11A in the radial direction of the cylindrical tube are formed in each of the pair of engaging portions 11A to be engaged.
Incidentally, the thickness of the long rectangular body 11 is about 15 mm, and the slit 12 is formed in a width of about 2 mm.

Therefore, in the end mounting configuration, the heat insulating member P is mounted on the outer peripheral portion of the cylindrical tube 1 in the following procedure.
First, each of the recessed portions 10 formed at both ends of the heat insulating member P on one side of the pair of semicircular heat insulating members P (semicircular heat insulating members PA) divided into two parts is a long rectangular body Engage 11
By the way, when the long rectangular body 11 is engaged with the recess 10, the long rectangular body 11 is engaged (inserted) with the concave 10 while being moved in the longitudinal direction, or the long rectangular body 11 Is engaged with the recess 10 while moving in the recess direction of the recess 10.

Thereafter, the heat insulating member P (semicircular heat insulating member PA) on one side engaged with the elongated rectangular body 11 is mounted in a state of being applied to the outer peripheral portion of the cylindrical tube 1.
Subsequently, the heat insulating member P on the other side is moved so as to approach the cylindrical pipe 1, and the heat insulating member P on the other side is engaged with the both ends of the heat insulating member P on one side. The concave portions 10 formed at both end portions of the member P are engaged while being moved in the tangential direction of the cylindrical pipe 1 at the opposing location where the end faces 5 of the pair of heat insulating members P are put together.

Specifically, first, the small diameter heat insulating member PS is attached to the outer peripheral surface of the cylindrical tube 1, then, the intermediate diameter heat insulating member PM is attached to the outer peripheral surface of the small diameter heat insulating member PS, and finally, the large diameter heat insulating member PL is attached. The intermediate diameter heat insulating member PM is mounted on the outer peripheral surface.
Thus, in the state where the small diameter heat insulation member PS, the medium diameter heat insulation member PM, and the large diameter heat insulation member PL are mounted, the semicircular heat insulation member P (semicircular shape divided into two on the outer peripheral portion of the cylindrical tube 1) A plurality of (three) heat insulation walls formed in a cylindrical shape and having different diameters in the heat insulation member PA) are provided in a state of forming a plurality of layers.

Further, as in the basic mounting configuration, the facing portion of the small diameter heat insulating member PS in a state in which the end surfaces are in contact with each other and the facing portion of the intermediate diameter heat insulating member PM in a state in which the end surfaces are in contact with each other Similarly, the opposing location of the medium diameter heat insulation member PM in a state where the end faces are in contact with each other and the opposite location of the large diameter heat insulation member PL in a state where the end surfaces are different. The small diameter heat insulating member PS, the intermediate diameter heat insulating member PM, and the large diameter heat insulating member PL are mounted in a form in which the phase in the circumferential direction of the cylindrical tube 1 differs by 90 degrees.

(About heat insulation reinforcement constitution)
In the present embodiment, a heat insulating reinforcing structure is provided which reinforces the heat insulating property between the plurality of heat insulating members P attached to the outer peripheral surface of the cylindrical tube 1, that is, between the adjacent heat insulating members P.
That is, the plurality of heat insulating members P mounted on the outer peripheral surface of the cylindrical tube 1 are cooled and contracted by the low temperature fluid flowing through the inside of the cylindrical tube 1, and as a result, the adjacent heat insulating members P Since a gap may be formed between the two, there is a possibility that the heat insulating property may be reduced, so a heat insulating reinforcing structure for reinforcing the heat insulating property is provided.

The heat insulating and reinforcing structure is provided to the inner side reinforcing structure provided to the heat insulating wall formed by the small diameter heat insulating member PS and the intermediate diameter heat insulating member PM, and to the heat insulating wall formed by the large diameter heat insulating member PL. In the following, the inward reinforcement structure and the outward reinforcement structure will be sequentially described. In FIGS. 1 to 6, the description of the heat insulating and reinforcing structure is omitted.

(Inward reinforcement configuration)
As shown in FIG. 8, the inner side reinforcement configuration is an adhesive having airtightness with respect to a portion positioned in a state where the end faces 5 of a pair of heat insulating members P aligned in the circumferential direction of the cylindrical tube 1 are abutted. The tape (moisture-proof butyl tape) 13 is attached, and a pair of engagement is made with respect to the adjacent heat insulating members P in a portion positioned in a state where the side surfaces 6 of the heat insulating members P lined in the axial center direction of the cylindrical tube 1 It is the structure which equips with connecting object W provided with stop part Wa.

A description will be given of the configuration for mounting the connecting body W to the adjacent heat insulating member P. A pair of small diameters in which the connecting body W including the pair of locking portions Wa are arranged adjacent to each other in the axial center direction of the cylindrical tube 1 It will be provided in the form inserted into the radial direction inner side of the cylindrical tube 1 separately with respect to the heat insulation member PS and the outer surface part of a pair of intermediate diameter heat insulation member PM located in a line adjacently.
A pair of small diameter heat insulating members PS adjacently arranged in the axial direction of the cylindrical tube 1 and a pair of intermediate diameter heat insulating members PM adjacently arranged are a plurality of layers (three layers) formed on the outer peripheral portion of the cylindrical tube 1 Among the heat insulation walls, the heat insulation wall on the inner side in the radial direction of the cylindrical tube 1 is formed, and the heat insulation wall corresponds to a pair of heat insulation members P adjacently arranged in the axial direction of the cylindrical pipe 1.

In the present embodiment, as shown in FIG. 9, the connector W is configured to include the locking portions Wa on both ends in the width direction of the bendable strip member 14, and the connector W includes a pair of It is mounted in a state of being wound around the outer surface portion of the heat insulating member P.
That is, the belt-like member 14 is formed of, for example, a tarpaulin which is a vinyl material obtained by sanding a woven fabric of polyester fiber with a soft synthetic resin film, and the hook formed in a pointed shape of synthetic resin on the belt-like member 14 Section Wa is attached.

Therefore, since the belt-like member 14 is not adhesive, after the belt-like member 14 is wound around the outer surface of the pair of heat insulating members P, the narrow width tape 15 having adhesiveness is wound on the wound belt-like member 14. It is configured to suppress the detachment of the fourteen.

(Outside reinforcement configuration)
As shown in FIG. 8, the outer reinforcement configuration is a strip-shaped first leakproof body having adhesiveness in a state of straddling a pair of large diameter heat insulating members PL arranged adjacent to each other in the axial direction of the cylindrical tube 1. 16 at each of a plurality of (two) opposing locations positioned in a state where end faces 5 of a plurality of (two) large-diameter heat insulating members PL aligned in the circumferential direction of the cylindrical tube 1 are attached. In a state of straddling a pair of large diameter heat insulating members PL arranged adjacent to one in the circumferential direction of 1, an adhesive band-like second leak preventing body 17 is adhered.

Incidentally, as apparent from the above description, the heat insulating wall formed by the large diameter heat insulating member PL corresponds to the heat insulating wall on the outermost side in the radial direction of the cylindrical tube 1 in the plurality (three) of heat insulating walls. It will be.

Furthermore, in the present embodiment, the square third leakproof body 18 having adhesiveness is attached to the entire outer peripheral surface of the large diameter heat insulating member PL to improve the heat insulating performance.
The first leakproof body 16, the second leakproof body 17 and the third leakproof body 18 are, for example, rubber-based materials having excellent adhesion to a support obtained by laminating aluminum foil and glass cloth. It is comprised using the tape (ALGC tape) which apply | coated the adhesive.

By the way, as a sequence for sticking each of the first leak preventing body 16, the second leak preventing body 17 and the third leak preventing body 18, first, the third leak preventing body 18 is stuck, and then the next Preferably, the second leak preventing body 17 is attached, and finally, the first leak preventing body 16 is attached.

Second Embodiment
Next, a second embodiment will be described. The second embodiment is different from the first embodiment in the formation of the slits 12 formed in the long rectangular body 11, and the other configuration is the first. Since this embodiment is the same as the embodiment, only the parts different from the first embodiment will be described, and the description of the same configuration as the first embodiment will be omitted.

As shown in FIGS. 10 and 11, in the second embodiment, the engaging portion is formed on only one of the engaging portions 11A of the pair of engaging portions 11A in the elongated rectangular body 11 as a cylindrical tube. A slit 12 is formed which separates in the radial direction of one.
That is, in the first embodiment, the slits 12 are formed in each of the pair of engaging portions 11A in the elongated rectangular body 11. However, in the second embodiment, one side of the pair of engaging portions 11A This embodiment differs from the first embodiment in that the slits 12 are formed only in the engagement portion 11A of the second embodiment.

In the second embodiment, first, the recessed portions 10 formed at both ends of the heat insulating member P on one side of the pair of semicircular heat insulating members P (semicircular heat insulating members PA) divided into two. When engaging the long rectangular body 11, the engaging part 11A in which the slit 12 is not formed is engaged with each.
By the way, when the long rectangular body 11 is engaged with the recess 10, the long rectangular body 11 is engaged (inserted) with the concave 10 while being moved in the longitudinal direction, or the long rectangular body 11 Is engaged with the recess 10 while moving in the recess direction of the recess 10.

Thereafter, the heat insulating member P on one side engaged with the elongated rectangular body 11 is mounted in a state of being pressed against the outer peripheral portion of the cylindrical tube 1.
Subsequently, the heat insulating member P on the other side is moved so as to approach the cylindrical tube 1, and the slits 12 in the long rectangular body 11 engaged with both ends of the heat insulating member P on one side are formed. The cylindrical tube 1 at the opposite position where the recessed portions 10 formed at both ends of the heat insulating member P on the other side with respect to the engaging portion 11A are positioned in a state where the end surfaces 5 of the pair of heat insulating members P Engage while moving tangentially.

Third Embodiment
Next, a third embodiment will be described. In the third embodiment, the configuration of the connection member B in the end mounting configuration is different from that of the first embodiment, and the other configurations are the same as the first embodiment. Since it is the same, parts different from the first embodiment will be described, and the description of the same configuration as the first embodiment will be omitted.

In the first embodiment described above, the outer diameter of the cylindrical tube 1 is about 30 mm, while in the third embodiment, the outer diameter of the cylindrical tube 1 is about 300 mm, so heat insulation The member P is formed in an arc of 90 degrees.

In the basic mounting configuration according to the third embodiment, as shown in FIG. 12, the heat insulating member P is connected in a plurality of layers (three layers) in a state of being connected by the connecting member 7 as in the first embodiment. It is mounted to form a thermal insulation wall.

Further, in the end mounting configuration, as shown in FIGS. 13 and 14, the semicircular semicircular heat insulating member PA divided into two in the circumferential direction of the cylindrical tube 1 is formed as an arc of 90 degrees. The two heat insulating members P are connected by the connecting member 7 used in the basic mounting configuration.

That is, in each of two opposing locations located in the circumferential direction of the cylindrical tube 1 in a state where the semicircular heat insulating members PA divided into two in the circumferential direction of the cylindrical tube abut on each other, a pair of adjacent thermal insulations The end portions of the members are connected in the axial center direction of the cylindrical tube 1 by a long connecting member B.

As a groove-like engaging portion V with which the connecting member B is engaged with each of the pair of heat insulating member ends at one side of the two opposing points described above, the radial direction of the cylindrical pipe 1 at the heat insulating member end A rectangular shaped cut-out portion 20 obtained by cutting the inner side portion in the circumferential direction of the cylindrical pipe 1 is radially outward of the cylindrical pipe 1 on the radially outer side portion of the cylindrical pipe 1 of the cut-out portion 20 It is formed in the form provided with the recessed part 20a for latching to dent.

Further, as the groove-like engaging portion V with which the connecting member B is engaged with each of the pair of heat insulating member end portions on the other side portion of the two opposing portions described above, similarly to the first embodiment described above The concave portions 10 recessed from the end face 5 along the tangential direction of the cylindrical tube 1 are flat along the tangential direction of the cylindrical tube 1 with the inner side surface 10 u and the outer side surface 10 g aligned along the radial direction of the cylindrical tube 1. It is formed in the form of a face.
In addition, the tangential direction of the cylindrical pipe 1 in this description means the tangential direction of the cylindrical pipe 1 in the opposing location located in the state with which the end surface 5 of a pair of heat insulation members P was put together.

The rectangular cut-out portion 20 cuts out the lower side portion 8c located on the lower side (the inner side in the radial direction of the cylindrical tube 1) of the recessed groove portion 8 in the basic mounting configuration as shown by the phantom line in FIG. By doing this, the locking groove 8a is used as the locking recess 20a.
Further, as shown by the phantom line in FIG. 13, as in the first embodiment described above, the recessed portion 10 is a side portion located on the lateral side of the locking groove 8 a in the recessed groove 8 in the basic mounting configuration. It is formed by excising 8b.

That is, in the present embodiment, the heat insulating member P including the recessed groove portion 8 is formed, and in the basic mounting mode, the heat insulating member P is used as it is.
Then, in the end mounting configuration, the lower portion 8c located on the lower side of the recessed groove portion 8 positioned at the end of the heat insulating member P on one side of the pair of heat insulating members P connected by the connecting member 7 Cut out to form the cut-out portion 20, and cut out the side portion 8b located on the lateral side of the locking groove 8a in the recessed groove portion 8 located at the end of the other side heat insulating member P A pair of heat insulating members P in which the cut-out portions 20 and the recessed portions 10 are formed as described above are used as the semicircular heat insulating members PA by forming the concave portions 10 of the shape.

Then, as shown in FIG. 15, the connecting member B on one side of the two opposing places is in a rectangular shape in which the cross-sectional shape is engaged with the rectangular cutouts 20 of the ends of the pair of heat insulating members. An M-shaped elongated M-shaped member 21 is formed to have a cross-sectional shape formed to include the main body portion 21A and a pair of locking convex portions 21a engaged with the locking concave portions 20a.

Further, as in the first embodiment, the connecting member B on the other side of the two opposing places has a cross-sectional shape on the inner side surface 10 u and the outer side surface 10 g of the respective recessed portions 10 of the pair of heat insulating member ends. It is configured as a long rectangular body 11 formed in a square shape having a flat surface along.

In the third embodiment, a pair of heat insulating members adjacent to each other at two opposing locations located in the circumferential direction of the cylindrical tube 1 with the end faces of the semicircular heat insulating member PA in a two-divided state abutted together In order to connect the end portions with the connection member B, the following procedure is performed.
First, the long M-shaped member 21 and the long rectangular body are respectively formed on the engaging portions V formed at both ends of the semicircular heat insulating member PA on one side of the pair of semicircular heat insulating members PA in a two-divided state Engage 11
That is, the long M-shaped member 21 is engaged with the engaging portion V formed as the rectangular cut-out portion 20 having the locking recess 20a, and the long rectangular body 11 is tangential to the cylindrical tube from the end face Engage with an engaging portion V formed as a recess 10 to be recessed into the

Thereafter, the semicircular heat insulating member PA on one side in which the long M-shaped member 21 and the long rectangular body 11 are engaged is attached to the outer peripheral portion of the cylindrical tube 1.
Subsequently, first, with respect to the long M-shaped member 21, the engaging portion V formed on one end side of the semicircular heat insulating member PA on the other side, that is, the cutting portion 20 including the locking recess 20a. The engaging portion V to be formed is engaged while being moved from a location corresponding to the outside of the cylindrical tube 1 in a direction to approach the cylindrical tube 1.

Next, with respect to the elongated rectangular body 11, the engaging portion V formed on the other end side of the semicircular heat insulating member PA on the other side, that is, recessed from the end face 5 in the tangential direction of the cylindrical tube 1 The engaging portion V formed as the recessed portion 10 is engaged while being moved in the tangential direction of the cylindrical pipe 1 at the opposing location located in a state where the end faces of the pair of semicircular heat insulating members PA are abutted together .

In such a procedure, in a state in which the end faces of the semicircular heat insulating member PA in a two-divided state are butted together, at each of two opposing locations located in the circumferential direction of the cylindrical tube 1, a pair of adjacent heat insulating member ends By connecting the parts by the connecting member B, the connecting member is mounted even if there is no space corresponding to the length of the connecting member B on one side of the semicircular heat insulating member PA in the axial direction of the cylindrical pipe 1 It will be possible.

Incidentally, in the basic mounting configuration, when the heat insulating member P is disassembled by removing the connecting member 7 for inspection of the cylindrical tube 1 or the like, there is a risk that the formation portion of the recessed groove portion 8 of the heat insulating member P may be damaged. In such a case, the lower side portion 8c located on the lower side of the recessed groove portion 8 is cut away to form the cut-out portion 20, and the connecting member 7 is replaced with heat insulation by the long M-shaped member 21. The members P may be connected.

Fourth Embodiment
Next, a fourth embodiment will be described. In the fourth embodiment, the configuration of the connecting member B in the end mounting configuration is different from that of the third embodiment, and the other configurations are the same as the third embodiment. Since it is the same, parts different from the third embodiment will be described, and description of the same configuration as the third embodiment will be omitted.

That is, the semi-circular heat insulating member PA divided into two in the circumferential direction of the cylindrical tube 1 connects the two heat insulating members P formed as an arc of 90 degrees by the connecting member 7 used in the basic mounting configuration Is configured by.
That is, in each of two opposing locations located in the circumferential direction of the cylindrical tube 1 in a state in which the semicircular heat insulating members PA divided into two in the circumferential direction of the cylindrical tube abut each other, a pair of adjacent thermal insulations The members P are provided so as to be connected by a long connecting member B along the axial center direction of the cylindrical tube 1.

As the groove-shaped engaging portion V with which the connecting member B is engaged with each of the pair of heat insulating member ends at the two opposing locations described above, the radially inward portion of the cylindrical tube 1 of the heat insulating member end is For locking, the rectangular cut-out portion 20 cut along the circumferential direction of the cylindrical pipe 1 is recessed radially outward of the cylindrical pipe 1 on the radially outer side portion of the cylindrical pipe 1 of the cut-out portion 20 It forms in the form provided with the recessed part 20a.

That is, in the present embodiment, the heat insulating member P including the recessed groove portion 8 is formed, and in the basic mounting mode, the heat insulating member P is used as it is.
Then, in the end mounting configuration, the cut-out portion 20 is formed by cutting the lower side portion 8c located on the lower side of the recessed groove portion 8 positioned at both ends of the pair of heat insulating members P connected by the connecting member 7 Then, the pair of heat insulating members P in which the cut-off portions 20 are formed as described above are used as a semicircular heat insulating member PA (see FIG. 13).

Then, the connecting members B at the two opposing locations engage with the rectangular main body portion 21A and the locking concave portion 20a which engage in the cross-sectional shape with the respective rectangular shaped cut-out portions 20 of the pair of heat insulating member ends. The cross-sectional shape formed in the form provided with a pair of latching convex part 21a is formed as M-shaped elongate M-shaped member 21 (refer FIG. 15).

In the fourth embodiment, a pair of heat insulating members adjacent to each other at two opposing locations located in the circumferential direction of the cylindrical tube 1 in a state in which the end faces of the semicircular heat insulating member PA in the two division state are abutted In order to connect the end portions with the connection member B, the following procedure is performed.
First, the long M-shaped member 21 is engaged with each of the engaging portions V formed on both ends of the semicircular heat insulating member PA on one side of the pair of semicircular heat insulating members PA in the two-divided state Do.
That is, the long M-shaped member 21 is engaged with the engaging portion V formed as the rectangular cutout portion 20 having the locking concave portion 20 a.

Thereafter, the semicircular heat insulating member PA on one side in which the long M-shaped member 21 is engaged is attached to the outer peripheral portion of the cylindrical pipe 1.
Subsequently, first, an engaging portion V formed on one end side of the semicircular heat insulating member PA on the other side with respect to one of the pair of elongated M-shaped members 21, that is, a locking recess 20 a The engaging portion V, which is formed as the rectangular cut-out portion 20, is engaged while being moved in a direction in which the cylindrical tube 1 is approached from a location corresponding to the outside of the cylindrical tube 1.

Next, with respect to the long M-shaped member 21 on the other side, a square having the engaging portion V formed on the other end side of the semicircular heat insulating member PA on the other side, that is, the recessed portion 20a for locking The engagement portion V, which is formed as the cut-out portion 20, is engaged while being moved from a location corresponding to the outer side of the cylindrical tube 1 in a direction to approach the cylindrical tube 1.

Incidentally, when moving the engaging portion V formed on the other end side of the semicircular heat insulating member PA on the other side from a location corresponding to the outside of the cylindrical tube 1 in a direction to approach the cylindrical tube 1 The other semicircular heat insulating member PA is elastically deformed so as to expand and contract along the radial direction of the cylindrical tube 1.

In such a procedure, in a state in which the end faces of the semicircular heat insulating member PA in a two-divided state are butted together, at each of two opposing locations located in the circumferential direction of the cylindrical tube 1, a pair of adjacent heat insulating member ends By connecting the parts by the connecting member B, the connecting member is mounted even if there is no space corresponding to the length of the connecting member B on one side of the semicircular heat insulating member PA in the axial direction of the cylindrical pipe 1 It will be possible (see FIG. 16).

[Another embodiment]
Hereinafter, other embodiments will be listed.
(1) In the said embodiment, although the case where the heat insulation member P was divided into 2 and 4 cases divided into 2 along the circumferential direction of the cylindrical pipe 1 was illustrated, not only this but in the basic mounting configuration The heat insulating member P may be divided into three or five or more along the circumferential direction of the cylindrical tube 1, and in the end mounting configuration, the heat insulating member P may be divided in the circumferential direction of the cylindrical tube 1 It may divide by even number of six or more divisions along the sides, and connect them to constitute a semicircular semicircular heat insulating member PA.

(2) In the above embodiment, although the case where the heat insulating member P is attached to the outer peripheral part of the cylindrical tube 1 is illustrated by the basic attachment configuration and the end attachment configuration, the end over the entire length of the cylindrical tube 1 You may implement by the form which mounts the heat insulation member P by mounting structure.

(3) In the above embodiment, although the connecting member B and the connecting member 7 and the heat insulating member P are formed of the same material, the present invention is not limited thereto. The connecting member B and the connecting member 7 and the heat insulating member P may be made of different materials. You may form.

(4) In the said embodiment, although the material of the heat insulation member P was made into urethane resin, the material of the heat insulation member P is not restricted to this. For example, the material of the heat insulating member P may be a synthetic resin such as polyethylene resin or nitrile rubber (NBR), or a natural resin such as natural rubber (NR). Similarly, the material of the connecting member B and the connecting member 7 may be a synthetic resin such as polyethylene resin or nitrile rubber (NBR) or a natural resin such as natural rubber (NR).

(5) In the said embodiment, although the case where the heat insulation wall of three layers was formed in the outer peripheral part of the cylindrical tube 1 as a heat insulation wall of several layers was illustrated, it implemented in the form which forms the heat insulation wall of two layers. In addition, four or more heat insulation walls may be formed.

(6) In the said embodiment, although the case where the slit 12 was formed in the elongate square 11 as the connection member B was illustrated, you may implement in the form which abbreviate | omits formation of the slit 12. FIG.

(7) In the above embodiment, the case where the connecting member B having a flat surface engaged with the recessed portion 10 having the inner surface 10 u and the outer surface 10 g is configured as a long rectangular body 11 having a rectangular cross section is exemplified. However, as the connection member B having a flat surface, the cross-sectional shape of the connection member B having a flat surface can be variously changed, for example, it is formed into a long body in which both ends in the cross-sectional shape are formed in a convex shape gradually narrowing.

The configurations disclosed in the above embodiment (including the other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

Reference Signs List 1 cylindrical tube 5 end surface 7 connecting member 7a locking connecting portion 8 recessed groove portion 8a locking groove portion 10 recessed portion 12 slit 20 cut portion 20a locking recessed portion 21A main body portion 21a locking convex portion B connecting member P heat insulating member PA Semi-circular heat insulating member U engagement groove V engagement portion

Claims

The two semicircular heat insulating members divided in the circumferential direction of the cylindrical tube on the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows are two end surfaces of the cylindrical tube positioned in the circumferential direction of the cylindrical tube. A heat insulating structure for a cylindrical tube provided in a state in which an end of a pair of heat insulating members adjacent to each other is connected by an elongated connecting member along the axial center direction of the cylindrical tube at each of opposite positions,
A radial engagement of the cylindrical tube at the end of the heat insulating member as a groove-like engaging portion in which the connecting member is engaged with each of the pair of heat insulating member ends at one side of the two opposing points The cut part which cut off the inner side part in the circumference along the circumferential direction of the cylindrical pipe is a lock which concaves radially outward of the cylindrical pipe in the radial direction outer side of the cylindrical pipe of the cut part. It is formed in the form provided with the recessed part for
The connecting member at one side of the two opposite places has a main body that engages with the cut-out portion of the pair of heat insulating member ends and a pair that engages with the locking recess. And a locking projection of the
As a groove-like engaging portion in which the connecting member is engaged with each of the pair of heat insulating member ends on the other side of the two opposing places, along the tangential direction of the cylindrical pipe from the end face The recessed portion to be recessed is formed in a form in which each of the inner side surface and the outer side surface aligned along the radial direction of the cylindrical tube is a flat surface along the tangential direction of the cylindrical tube,
The connecting member at the other side of the two opposing places is formed in a shape having a flat surface along the inner side surface and the outer side surface of each of the recessed portions of the pair of heat insulating member ends. Insulation structure for cylindrical tubes.
The two semicircular heat insulating members divided in the circumferential direction of the cylindrical tube on the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows are two end surfaces of the cylindrical tube positioned in the circumferential direction of the cylindrical tube. A heat insulating structure for a cylindrical tube provided in a state in which an end of a pair of heat insulating members adjacent to each other is connected by an elongated connecting member along the axial center direction of the cylindrical tube at each of opposite positions,
A radially inward portion of the cylindrical member of the heat insulating member end portion is formed as a groove-shaped engaging portion engaged with the connecting member at each of the pair of heat insulating member ends at the two opposing locations. According to an aspect of the present invention, the cutting portion cut along the circumferential direction of the cylindrical pipe includes a locking recess that is recessed radially outward of the cylindrical pipe on the radially outer side portion of the cylindrical pipe of the cutting portion. Formed
The connecting member at the two opposing locations includes a main body portion which engages with the cut-out portion of the pair of heat insulating member end portions and a pair of locking convex portions which engages with the locking concave portion. The heat insulation structure for cylindrical tubes currently formed in the form provided with.
The two semicircular heat insulating members divided in the circumferential direction of the cylindrical tube on the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows are two end surfaces of the cylindrical tube positioned in the circumferential direction of the cylindrical tube. A heat insulating structure for a cylindrical tube provided in a state in which an end of a pair of heat insulating members adjacent to each other is connected by an elongated connecting member along the axial center direction of the cylindrical tube at each of opposite positions,
A groove-shaped engaging portion engaged with the connecting member at each of the pair of heat insulating member end portions at the two opposing locations is a recessed portion recessed along the tangential direction of the cylindrical pipe from the end surface The inner surface and the outer surface aligned along the radial direction of the cylindrical tube are formed as flat surfaces along the tangential direction of the cylindrical tube,
The heat insulating structure for a cylindrical tube, wherein the connecting members at the two opposing locations have a cross-sectional shape having a flat surface along the inner side surface and the outer surface of each of the recessed portions of the pair of heat insulating member ends. .
The connecting member formed in a shape having a flat surface is formed of an elastically deformable material, and on one side engaging portion of a pair of engaging portions engaged with the adjacent recessed portion in the connecting member, The heat insulation structure for cylindrical tubes according to claim 1 or 3, wherein slits for separating the engaging portions in the radial direction of the cylindrical tubes are formed.
The connecting member formed in a shape having a flat surface is formed of an elastically deformable material, and the engaging portion is formed on each of a pair of engaging portions engaged with the adjacent recessed portions in the connecting member. The heat insulating structure for cylindrical tubes according to claim 1 or 3, wherein slits separating in the radial direction of the cylindrical tubes are formed.
On the outer peripheral portion of the cylindrical tube, a plurality of heat insulating walls formed in a cylindrical shape with different diameters by the semicircular heat insulating members divided into two are provided in a state of forming a plurality of layers The heat insulating structure for a cylindrical tube according to any one of claims 1 to 5.
Divided into a plurality in the circumferential direction of the cylindrical tube at a location adjacent to the axial center direction of the cylindrical tube with respect to the installation location of the semicircular heat insulating member connected by the connection member in the outer peripheral portion of the cylindrical tube In each of a plurality of opposing locations located in the circumferential direction of the cylindrical tube, with the arc-shaped heat insulating members abutted at the end faces, a pair of adjacent heat insulating member ends in the axial center direction of the cylindrical tube It is provided in the state of being connected by a long connecting member along the line,
A recessed groove portion recessed in the circumferential direction of the cylindrical pipe from the end surface as an engaging groove portion of the connection member is provided in each of the pair of heat insulating member end portions connected by the connection member, the recessed groove portion A radially outer side portion of the cylindrical tube, and a locking groove recessed outward in the radial direction of the cylindrical tube;
In the embodiment, the connecting member includes a main body connecting portion engaged with the recessed groove portion of each of the pair of heat insulating member ends and a pair of locking connecting portions engaged with the locking groove portion. The heat insulating structure for a cylindrical tube according to any one of claims 1 to 6, which is formed.
A plurality of heat insulating wall portions formed in a cylindrical shape with different diameters by the plurality of arc-shaped heat insulating members connected by the connecting member form a plurality of layers on the outer peripheral portion of the cylindrical tube The heat insulation structure for cylindrical tubes of Claim 7 provided in the state to be.