TW201932746A - Insulation structure for cylindrical pipe - Google Patents

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

Insulation structure for cylindrical tube

The present invention relates to a heat insulating structure for a cylindrical tube, which is a semicircular heat insulating member in which a circumferential direction of the cylindrical tube is divided into two at an outer peripheral portion of a cylindrical tube through which a low-temperature fluid flows, and in which the end faces are butted against each other. Each of the two opposing portions located in the circumferential direction of the cylindrical tube is connected to the end of the adjacent cylindrical member by a long connecting member along the axial direction of the cylindrical tube. Settings.

In the heat insulating structure for the cylindrical tube, the outer peripheral portion of the cylindrical tube through which the low-temperature fluid such as LNG or LPG flows is covered by the heat insulating member to thermally insulate the cylindrical tube, and usually, the circle is insulated by the heat insulating member. The outer peripheral portion of the bobbin is covered in a plurality of layers (for example, two or three layers).
Moreover, when the cylindrical tube is covered in a plurality of layers, the heat insulating members having different diameters are arranged in a state of being concentrically overlapped.

As a conventional example of the heat insulating structure for a cylindrical tube, each of the end portions of the pair of heat insulating members connected by the connecting member is a groove-shaped engaging portion that is engaged with the connecting member, and is formed from the end of the heat insulating member. The concave end portion that is recessed toward the circumferential direction of the cylindrical tube forms a locking groove portion that faces the circle on the radially outer side of the cylindrical tube of the concave groove portion. The tubular member is recessed in the radial outer side, and the connecting member is formed to have a cross-sectional shape including a main body connecting portion that engages with each of the recessed groove portions of the pair of heat insulating member ends, and a locking portion that engages with the locking groove portion A form of a pair of locking connection portions (for example, refer to Patent Document 1).
[Previous Technical Literature]
[Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2016-194368

[Problems to be solved by the invention]

The cylindrical tube is generally formed in a state in which the flange portion for connection is provided at both end portions, and a plurality of cylindrical tubes are flange-connected to form a flow path for circulating a low-temperature fluid, and There is a case where the connecting portion of the cylindrical pipe is connected to the valve body such as the opening and closing valve by the flange portion.
Further, when the heat insulating member is attached to the outer peripheral portion of the cylindrical tube, the heat insulating member having a predetermined length is sequentially attached from the one end portion of the cylindrical tube toward the other end portion in the axial direction of the cylindrical tube. on.

In other words, a semi-circular heat insulating member which is divided into two in the circumferential direction of the cylindrical tube at a position adjacent to one end portion of the cylindrical tube is arranged in the circumferential direction of the cylindrical tube in a state in which the end faces are butted against each other. In the state in which the long connecting member is moved in the longitudinal direction, the heat insulating member is attached (inserted) to the concave groove portion formed at each end portion of the pair of heat insulating member ends, and then the heat insulating member is mounted. When it is adjacent to the installed heat insulating member, it is sequentially performed from one end portion of the cylindrical tube toward the other end portion: a semicircular heat insulating member which is divided into two portions in the circumferential direction of the cylindrical tube, and the end surface is formed In a state in which the mutually abutted states are arranged in the circumferential direction of the cylindrical tube, in this state, the long connecting members are moved in the longitudinal direction, and are engaged (inserted) at the end of the pair of heat insulating members. A heat insulating member is provided in each of the concave groove portions formed in the portion.

However, the heat insulating member is sequentially installed from one end portion of the cylindrical tube toward the other end portion, and finally, in the case where the heat insulating member is attached to the other end portion of the cylindrical tube, the cylindrical tube The flange at the other end portion is in a state in which the concave groove portions formed by the respective end portions of the pair of heat insulating members are blocked, so that the flange portion is inconvenient, and the long connecting member cannot be moved to the long side. The direction is engaged (inserted) at a recessed groove portion formed at each end of the pair of heat insulating members.

In other words, in order to allow the long connecting member to move in the longitudinal direction, the concave groove portion formed in each of the end portions of the pair of heat insulating members is engaged (inserted) in the heat insulating member. At one side of the axial direction of the cylindrical tube, there must be a space corresponding to the length of the connecting member. However, when the insulating member is attached to the other end portion of the cylindrical tube, there is a convexity. At the edge, it becomes a space that cannot ensure the length of the connecting member.

Further, a gap is formed between the flange of the other end portion of the cylindrical tube and the heat insulating member, and it is considered that the long connecting member is bent while being bent while being engaged (inserted) at the end of the pair of heat insulating members. The concave groove portion formed in each of the portions is formed. However, in this case, the long connecting member may be broken and may not be engaged (inserted) in the concave groove portion.

Therefore, as shown in Figs. 17 and 18, it is considered that one of the end faces of the semicircular heat insulating member P divided into two parts in the circumferential direction of the cylindrical tube 1 faces each other in the end portion of the heat insulating member. A step-like fitting portion Z that is formed in a step shape along the radial direction of the cylindrical tube 1 is formed. Further, in the seventeenth and eighteenth aspects, the case where the heat insulating member is provided in three layers is exemplified.

However, in this case, since the type of the heat insulating member P including the step-shaped fitting portion Z is increased, not only the production and management are more complicated, but even the step-like fitting portion Z of the end portions of the pair of heat insulating members is fitted. The fitting is also easy to fall off, and there is a problem that it is difficult to satisfactorily perform the mounting of the heat insulating member P.
In other words, in the state in which the stepped fitting portions Z of the pair of heat insulating members are fitted, since the fitting state is basically maintained by the frictional force, the fitting is likely to fall off.

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a heat insulating structure for a cylindrical tube which does not have a space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical tube in the heat insulating member. Further, the connecting member can be mounted in a state in which the engagement with the heat insulating member is hard to fall off.

[Means to solve problems]

The heat insulating structure for a cylindrical tube according to the present invention is a semicircular heat insulating member which is divided into two in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and the end faces are butted together. In each of two opposing positions in the circumferential direction of the cylindrical tube, a pair of connecting members are connected to the end of one of the adjacent heat insulating members along the axial direction of the cylindrical tube. The cylindrical tube is provided with a heat insulating structure, and its characteristics are as follows:
One of the one of the two opposing portions faces the end of the heat insulating member, and the groove-shaped engaging portion that is engaged with the connecting member is formed along the circumferential direction of the cylindrical tube. a cut-out portion that is cut out at an inner side portion of the cylindrical tube at an end portion of the heat insulating member, and a radially outward side portion of the cylindrical tube of the cut-off portion is formed to face the cylinder a form of a locking recess recessed in a radially outer side of the tube;
The connecting member in one of the two opposing portions is formed to have a cross-sectional shape including a main body portion that engages with each of the pair of the heat insulating member end portions, and the card portion a form of a pair of locking projections that are engaged with the recess;
One of the other of the two opposing portions faces the end of the heat insulating member, and the groove-shaped engaging portion that is engaged with the connecting member is such that the end surface is along the cylindrical tube a recessed portion recessed in the tangential direction, wherein each of the inner side surface and the outer side surface arranged along the radial direction of the cylindrical tube is formed along a flat surface in a tangential direction of the cylindrical tube;
The connecting member in the other of the two opposing directions is formed in a shape having a flat surface having a flat surface, and the flat surface is the concave along each of the ends of the pair of the heat insulating members The inner side and the outer side of the entrance.

Further, the tangential direction of the cylindrical tube described above means a tangential direction of the cylindrical tube positioned in the opposing direction in a state in which the end faces of the pair of heat insulating members are butted.

That is, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical pipe, the connecting member is used to insulate one of the adjacent pairs. When the member end portion is in a connected state, for example, it can be executed in the following order.
First, a connecting member including a main body portion and a locking convex portion and a connecting member having a flat surface shape are engaged with each other at both end portions of the heat insulating member on one side of a pair of semicircular heat insulating members divided into two portions. Each of the formed engaging portions. Further, the connecting member including the main body portion and the locking convex portion is engaged with an engaging portion formed as a cut-out portion having the locking concave portion, and a connecting member having a flat surface shape is engaged The engaging portion formed by the concave portion that is recessed from the end surface toward the tangential direction of the cylindrical tube.

Then, the heat insulating member on one side of the connecting member having the main body portion and the locking convex portion and the connecting member having the flat surface shape is attached to the outer peripheral portion of the cylindrical tube.
Then, the engaging portion formed on one end side of the other side of the heat insulating member, that is, the cut portion formed as the recessed portion for locking, is formed on the connecting member including the main body portion and the locking convex portion. The engaging portion is engaged while moving in a direction approaching the cylindrical tube from the outer side corresponding to the cylindrical tube.

Next, with respect to the connecting member having the shape of a flat surface, the engaging portion formed on the other end side of the other side of the heat insulating member, that is, the concave portion recessed as a tangential direction from the end surface toward the cylindrical tube The formed engaging portion is moved while being engaged with the end faces of the pair of heat insulating members in the tangential direction of the cylindrical tube in the opposing direction.

In such a state, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, a pair of adjacent ones are insulated by the connecting members for each of the two opposing positions located in the circumferential direction of the cylindrical tube. The member ends are connected, whereby the connecting member can be attached even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical tube in the heat insulating member.

In the state in which the engaging portion formed as the cut-out portion having the locking recessed portion is engaged with the connecting member including the main body portion and the locking convex portion, the locking convex portion gives the locking concave portion By locking, the card having the main body portion and the locking convex portion and the engaging portion are combined so as not to fall off.
Further, in a state in which the engaging portion formed by the concave portion recessed from the end surface toward the tangential direction of the cylindrical tube is engaged with the connecting member having the shape of a flat surface, for example, even if the heat insulating member is intended to be the body When the engaging portion of the connecting member having the locking convex portion is rotated in the center, the flat surface along the inner side surface and the outer side surface of the concave portion in the connecting member having the flat surface shape is opposed to Each of the inner side surface and the outer side surface formed by the flat surface of the concave portion which is arranged along the radial direction of the cylindrical tube and along the tangential direction of the cylindrical tube is abutted to prevent the rotational movement or the like, thereby The card having the flat surface shape and the card of the engaging portion are combined to be hard to fall off.

In short, according to the heat insulating structure for a cylindrical tube of the present invention, even if there is no space corresponding to the length of the connecting member at one side of the axial direction of the cylindrical tube in the heat insulating member, the connecting member can be installed as The state in which the engagement with the heat insulating member is hard to fall off.

The heat insulating structure for a cylindrical tube according to the present invention is a semicircular heat insulating member which is divided into two in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and the end faces are butted together. In each of two opposing positions in the circumferential direction of the cylindrical tube, a pair of connecting members are connected to the end of one of the adjacent heat insulating members along the axial direction of the cylindrical tube. The cylindrical tube is provided with a heat insulating structure, and its characteristics are as follows:
In each of the pair of the heat insulating member ends of the two opposing portions, the groove-shaped engaging portion that is engaged with the connecting member is disposed at the end of the heat insulating member along the circumferential direction of the cylindrical tube a cut-out portion in which the inner side portion of the cylindrical tube in the radial direction is cut out is formed on the radially outer side portion of the cylindrical tube of the cut portion so as to face the outer side in the radial direction of the cylindrical tube a form of a recessed recess for recessing;
The connecting member in the two opposing portions is formed to have a cross-sectional shape including a main body portion that engages with the cutout portion of each of the pair of the heat insulating member ends, and the engagement portion with the locking recess portion The form of a pair of locking projections.

That is, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical pipe, the connecting member is used to insulate one of the adjacent pairs. When the member end portion is in a connected state, for example, it can be executed in the following order.
First, the connecting member including the main body portion and the locking convex portion is engaged with each of the engaging portions formed at both end portions of the heat insulating member on one side of the two semi-circular heat insulating members.

Then, a heat insulating member that has one side of the connecting member including the main body portion and the locking convex portion at the both end portions is attached to the outer peripheral portion of the cylindrical tube.
Then, first, the locking portion formed by the heat insulating member on the other side is provided as one of the connecting member including the main body portion and the locking convex portion, that is, the cut portion having the locking recess portion The formed locking portion is engaged while moving in a direction approaching the cylindrical tube from the outer side corresponding to the cylindrical tube.

Then, the engagement portion formed on the other end side of the other side of the heat insulating member with respect to the other of the connecting member including the main body portion and the locking convex portion, that is, the recessed portion having the locking recess The locking portion formed by the cutout portion is engaged while moving in a direction approaching the cylindrical tube from the outer side corresponding to the cylindrical tube.

Further, when the engaging portion formed on the other end side of the other side of the heat insulating member is moved in a direction approaching the cylindrical tube from the outer side corresponding to the cylindrical tube, the other side is insulated. Since the member is elastically deformed so as to expand and contract in the radial direction of the cylindrical tube, it is more suitable when the diameter of the heat insulating member is larger than the height of the locking convex portion.

In such a state, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, a pair of adjacent ones are insulated by the connecting members for each of the two opposing positions located in the circumferential direction of the cylindrical tube. The member ends are connected, whereby the connecting member can be attached even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical tube in the heat insulating member.

In the state in which the engaging portion formed as the cut-out portion having the locking recessed portion is engaged with the connecting member including the main body portion and the locking convex portion, the locking convex portion gives the locking concave portion By locking, the card having the main body portion and the locking convex portion and the engaging portion are combined so as not to fall off.

In short, according to the heat insulating structure for a cylindrical tube of the present invention, even if there is no space corresponding to the length of the connecting member at one side of the axial direction of the cylindrical tube in the heat insulating member, the connecting member can be installed as The state in which the engagement with the heat insulating member is hard to fall off.

The heat insulating structure for a cylindrical tube according to the present invention is a semicircular heat insulating member which is divided into two in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and the end faces are butted together. In each of two opposing positions in the circumferential direction of the cylindrical tube, a pair of connecting members are connected to the end of one of the adjacent heat insulating members along the axial direction of the cylindrical tube. The cylindrical tube is provided with a heat insulating structure, and its characteristics are as follows:
In each of the pair of the heat insulating member end portions of the two opposing portions, the groove-shaped engaging portion that is engaged with the connecting member is recessed from the end surface along the tangential direction of the cylindrical tube a recessed portion formed in a shape of a flat surface along a tangential direction of the cylindrical tube, each of an inner side surface and an outer side surface arranged along a radial direction of the cylindrical tube;
The connecting member in the two opposing portions has a cross-sectional shape formed to have a flat surface, and the flat surface is the inner side surface of the concave portion along each of the pair of the heat insulating member end portions and Outer side.

Further, the tangential direction of the cylindrical tube described above means a tangential direction of the cylindrical tube positioned in the opposing direction in a state in which the end faces of the pair of heat insulating members are butted.

That is, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical pipe, the connecting member is used to insulate one of the adjacent pairs. When the member end portions are connected to each other, for example, they can be executed in the following order.
First, a connecting member having a flat surface shape is engaged with each of the engaging portions formed at both end portions of the heat insulating member on one side of a pair of semi-circular heat insulating members divided into two portions.

Then, a heat insulating member on one side of the connecting member having a flat surface shape at both end portions is attached to the outer peripheral portion of the cylindrical tube.
Then, the heat insulating member on the other side is moved so as to approach the cylindrical tube, and the connecting member having the flat surface shape at both end portions of the heat insulating member that has been engaged with the one side is formed on the other side. The engaging portion formed at the both end portions of the heat insulating member, that is, the engaging portion formed by the concave portion recessed from the end surface toward the tangential direction of the cylindrical tube, is in a state of being butted against the end faces of the pair of heat insulating members The orientation is moved in the tangential direction of the cylindrical tube in the opposite direction and is engaged with one side.

In such a state, in a state in which the end faces of the heat insulating members divided into two parts are butted against each other, a pair of adjacent ones are insulated by the connecting members for each of the two opposing positions located in the circumferential direction of the cylindrical tube. The member ends are connected, whereby the connecting member can be attached even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical tube in the heat insulating member.

Further, in a state in which the engaging portion formed by the concave portion recessed from the end surface toward the tangential direction of the cylindrical tube is engaged with the connecting member having the shape of a flat surface, for example, even if the heat insulating member is intended to be When the engaging portion of the connecting member on one side is rotated in the center, the concave portion is formed along the flat surface along the inner side surface and the outer side surface of the concave portion in the connecting member having the flat surface shape. Each of the inner side surface and the outer side surface formed by the flat surface of the cylindrical tube in the radial direction of the tangential direction of the cylindrical tube is abutted to prevent the rotational motion or the like, thereby making the flat surface shape The card of the connecting member and the engaging portion is combined to be difficult to fall off.

In short, according to the heat insulating structure for a cylindrical tube of the present invention, even if there is no space corresponding to the length of the connecting member at one side of the axial direction of the cylindrical tube in the heat insulating member, the connecting member can be installed as The state in which the engagement with the heat insulating member is hard to fall off.

A further feature of the heat insulating structure for a cylindrical tube according to the present invention is that the connecting member having a shape having a flat surface is formed of an elastically deformable material, and the adjacent concave portion is formed in the connecting member. The engaging portion on one side of the pair of engaging portions that are engaged with the engaging portion is formed with a slit that separates the engaging portion from the radial direction of the cylindrical tube.

That is, since the engaging portion on one side of the pair of engaging portions for engaging with the adjacent concave portion in the connecting member having the shape of the flat surface is formed, the engaging portion is formed toward the cylindrical tube a radially separated slit, for example, an engaging portion that does not form a slit among one of the pair of engaging portions of the connecting member to be engaged with the first insulating member of the pair of heat insulating members Engaging the engaging portion, and then engaging the engaging portion of the heat insulating member that is mounted after the pair of heat insulating members to engage the slit-forming engaging portion of one of the engaging members By doing so, the engagement portion formed with the slit can be elastically deformed, and the engagement portion can be engaged with the engagement portion to perform well.

In other words, when the engaging portion in which the slit is formed is pressed so as to be sandwiched in the radial direction, the width in the radial direction of the cylindrical tube can be reduced by the formation of the slit, so that it can be formed at the same time. The engaging portion having the slit is elastically deformed so as to reduce the width in the radial direction of the cylindrical tube, and the engagement of the engaging portion of the heat insulating member with the engaging portion where the slit is formed can be satisfactorily performed. .

Further, the width of the engaging portion in which the slit is formed in the radial direction of the cylindrical tube is formed to be slightly larger than the width between the inner side surface and the outer side surface of the concave portion forming the engaging portion. When the engaging portion of the heat insulating member is engaged with the engaging portion where the slit is formed, the contact between the inner side surface and the outer side surface of the concave portion for forming the engaging portion and the engaging portion formed with the slit can be improved. Pressure is not easy to detach.

In short, according to the further feature of the heat insulating structure for a cylindrical tube according to the present invention, the engaging portion of the heat insulating member to be mounted later in the pair of heat insulating members can be satisfactorily engaged with: the connecting member Among the pair of engaging portions, the engaging portion formed with the slit is formed.

A further feature of the heat insulating structure for a cylindrical tube according to the present invention is that the connecting member having a shape having a flat surface is formed of an elastically deformable material, and the adjacent concave portion is formed in the connecting member. Each of the pair of engaging portions that are engaged with the engaging portion is formed with a slit that separates the engaging portion from the radial direction of the cylindrical tube.

That is, since each of the pair of engaging portions for engaging with the adjacent concave portions in the connecting member having the shape of the flat surface is formed, the engaging portion is formed to be separated from the radial direction of the cylindrical tube. The slit can be satisfactorily performed: the engaging portion of one of the pair of engaging portions in the connecting member is engaged with the engaging portion of the insulating member which is first installed among the pair of insulating members, or The engaging portion of the heat insulating member to be mounted after the pair of heat insulating members is engaged with the remaining engaging portion of one of the engaging members.

In other words, when the engaging portion in which the slit is formed is pressed so as to be sandwiched in the radial direction, the width in the radial direction of the cylindrical tube can be reduced by the formation of the slit, so that it can be formed at the same time. The engaging portion having the slit is elastically deformed so as to reduce the width in the radial direction of the cylindrical tube, and the engagement of the engaging portion of the heat insulating member with the engaging portion where the slit is formed can be satisfactorily performed. .

Further, the width of the engaging portion in which the slit is formed in the radial direction of the cylindrical tube is formed to be slightly larger than the width between the inner side surface and the outer side surface of the concave portion forming the engaging portion. When the engaging portion of the heat insulating member is engaged with the engaging portion where the slit is formed, the contact between the inner side surface and the outer side surface of the concave portion for forming the engaging portion and the engaging portion formed with the slit can be improved. Pressure is not easy to detach.

In short, the cylindrical tube heat insulating structure according to the present invention is further characterized in that the engaging portion of the heat insulating member is engaged with the pair of engaging portions of the connecting member.

Further, the heat insulating structure for a cylindrical tube according to the present invention is characterized in that a plurality of heat insulating walls formed in a cylindrical shape and different in diameter from the heat insulating member having a semicircular shape divided into two portions are formed into a plurality of layers. The state is set at the outer peripheral portion of the cylindrical tube.

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

In short, the cylindrical tube according to the present invention is further characterized by the heat insulating structure, and the cylindrical tube can be appropriately insulated.

Further, the heat insulating structure for a cylindrical tube according to the present invention is characterized in that the cylindrical tube is disposed at a position of a semicircular heat insulating member connected to the connecting member in an outer peripheral portion of the cylindrical tube. In the circumferential direction of the cylindrical tube, a plurality of arc-shaped heat insulating members are formed in the circumferential direction of the cylindrical tube, and a plurality of opposing directions in the circumferential direction of the cylindrical tube are obtained in a state in which the end faces are butted against each other. Each of the portions is provided in a state in which the end portions of the adjacent pair of heat insulating members are coupled along the axial direction of the cylindrical tube by the long connecting members;
Each of the end portions of the heat insulating member is connected to one end of the heat insulating member by the connecting member, and the engaging groove portion of the connecting member is a concave groove portion that is recessed from the end surface toward the circumferential direction of the cylindrical tube. The radially outer side portion of the cylindrical tube of the recessed groove portion is formed to have a locking groove portion that is recessed toward the radially outer side of the cylindrical tube;
The connecting member includes a main body connecting portion that is engaged with the recessed groove portion of each of the pair of the heat insulating member ends, and a pair of locking connecting portions that are engaged with the locking groove portion. The form.

In other words, when the heat insulating member having a predetermined length is provided in the axial direction of the cylindrical tube from the one end portion of the cylindrical tube toward the other end portion, it is adjacent to one end portion of the cylindrical tube, or At a certain distance from the other end of the cylindrical pipe, an arc-shaped heat insulating member connected by the connecting member is installed, and finally, a connection is provided adjacent to the other end portion of the cylindrical pipe. The semicircular heat insulating member to which the member is connected can thereby be provided with the heat insulating member in a proper length over the entire length of the cylindrical tube.

In addition, when the arc-shaped heat insulating member connected by the long connecting member is attached to the outer peripheral portion of the cylindrical tube, the arcuate heat insulating member that is divided into the circumferential direction of the cylindrical tube is In a state in which the end faces are butted against each other in the circumferential direction of the cylindrical tube, the long connecting members are moved in the longitudinal direction, and are engaged (inserted) in the respective end portions of the adjacent heat insulating members. The engagement groove formed in the middle is provided with a heat insulating member.

Further, the engaging groove portion formed in each of the end portions of the heat insulating member connected by the connecting member is a concave groove portion recessed from the end surface of the heat insulating member toward the circumferential direction of the cylindrical tube, and the concave groove portion is formed in the concave groove portion. The radially outer side portion of the cylindrical tube is formed to have a locking groove portion that is recessed toward the radially outer side of the cylindrical tube, and in this configuration, the connecting member is formed to have a cross-sectional shape: The main body connecting portion of the recessed groove portion of each of the end portions of the heat insulating member and the pair of locking connecting portions that are engaged with the locking groove portion are engaged with each other, so that the locking groove portion is locked by the locking connecting portion The adjacent heat insulating member can be appropriately connected. Therefore, when the heat insulating member is cooled by the low temperature fluid flowing inside the cylindrical tube, the end faces of the adjacent sectional members can be suppressed by the heat shrinkage of the heat insulating member. A large gap occurs between them, and the cylindrical tube can be appropriately insulated.

In short, according to the further feature of the heat insulating structure for a cylindrical tube of the present invention, the heat insulating member can be appropriately disposed across the entire length of the cylindrical tube while the cylindrical tube is properly insulated.

Further, the heat insulating structure for a cylindrical tube according to the present invention is characterized in that the plurality of heat insulating members are formed in a cylindrical shape and different in diameter from a plurality of arc-shaped heat insulating members connected by the connecting member. The wall portion is provided on the outer peripheral portion of the cylindrical tube in a state in which a plurality of layers are formed.

In other words, a plurality of heat insulating wall portions in a cylindrical shape and different diameters formed by arc-shaped heat insulating members connected by a connecting member are provided on the outer peripheral portion of the cylindrical tube in a state in which a plurality of layers are formed. Therefore, it is possible to insulate the cylindrical tube more appropriately.

In short, the cylindrical tube according to the present invention is further characterized by the heat insulating structure, and the cylindrical tube can be more appropriately insulated.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.

(The overall structure of the insulation structure)
As shown in Fig. 1 and Fig. 2, a cylindrical tube 1 for circulating a low-temperature fluid such as LNG or LPG is provided, and the outer peripheral portion of the cylindrical tube 1 is arranged in the circumferential direction and the axial center of the cylindrical tube 1. In the state of the direction, a plurality of heat insulating members P for urethane foaming system in which the urethane resin is foamed are provided.

The plurality of heat insulating members P are in a state of having a certain thickness in the radial direction of the cylindrical tube 1 so as to extend in an arc shape (semicircular shape in the present embodiment) along the circumferential direction of the cylindrical tube 1. The elongated base material having a long length in the axial direction of the cylindrical tube 1 is cut into a predetermined length in the axial direction of the cylindrical tube 1.
In the following description, in the following description, the surface on the radially outer side of the heat insulating member P is referred to as the outer surface 3, and the surface on the radially inner side is referred to as the inner surface 4, and the circumferential direction is used. The faces at both ends serve as the end faces 5, and the faces on both sides in the axial direction are referred to as the side faces 6.

In the present embodiment, the heat insulating member P is provided to form a three-layer heat insulating wall.
In other words, as the heat insulating member P, a large diameter large-diameter heat insulating member PL, an intermediate diameter intermediate diameter heat insulating member PM, and a minimum diameter small-diameter heat insulating member PS (see FIGS. 3 and 4) are provided.
Further, in the state in which the heat insulating member P has been laminated, the outer surface 3 of the large-diameter heat insulating member PL is positioned 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 are Arranged in 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 the outer circumference of the cylindrical tube 1. The faces are arranged in the same diameter.

A flange F is provided at both end portions of the cylindrical tube 1, and the flange F of the adjacent cylindrical tube 1 is coupled by a bolt to form a flow path through which the low-temperature fluid flows.
The plurality of heat insulating members P are attached in order from the one end portion to the other end portion of the cylindrical tube 1, and are attached to the other end of the cylindrical tube 1 and the other of the cylindrical tube 1 The place where one end is adjacent and the space between them.

The heat insulating member P is arranged in the axial direction of the cylindrical tube 1, and the form of the small-diameter heat insulating member PS in which the smallest diameter is arranged is the same as the shape of the large-diameter heat insulating member PL in which the largest diameter is arranged. The shape of the intermediate diameter heat insulating member PM of the diameter is different.
In other words, 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 direction of the cylindrical tube 1 becomes a basic length (for example, 1 m).

Further, in the small-diameter heat insulating member PS and the large-diameter heat insulating member PL, the basic length heat insulating member P is arranged from one end portion to the other end portion of the cylindrical tube 1, and the intermediate diameter heat insulating member PM is opposed to the both. The heat insulating member P having a length of half the basic length (for example, 0.5 m) is first arranged from one end portion of the cylindrical tube 1, and then the basic length of the heat insulating member P is directed toward the other end portion of the cylindrical tube 1. The arrangement of the way.

At a position adjacent to the other end portion of the cylindrical tube 1, the length of the small-diameter heat insulating member PS, the intermediate-diameter heat insulating member PM, and the large-diameter heat insulating member PL in the axial direction is matched with the axial direction of the cylindrical tube 1. The length is determined appropriately.
However, in order to form a space in which the connecting member 7 to be described later is installed, the shaft of the small-diameter heat insulating member PS, the intermediate-diameter heat insulating member PM, and the large-diameter heat insulating member PL which are adjacent to the other end portion of the cylindrical tube 1 are installed. The length in the direction of the heart is formed to have a length of 1 m or more.

Further, with respect to the intermediate-diameter heat insulating member PM, in order to set the intermediate-diameter heat insulating member PM having a length of half of the basic length (for example, 0.5 m) at a position adjacent to one end portion of the cylindrical tube 1, the cylindrical tube 1 is The length of the small-diameter heat insulating member PS and the large-diameter heat insulating member PL in the axial direction is different from the length of the intermediate-diameter heat insulating member PM in the axial direction.
In the present embodiment, the length in the axial direction of the intermediate-diameter heat insulating member PM is increased by half the basic length (for example, 0.5 m) with respect to the length in the axial direction of the small-diameter heat insulating member PS and the large-diameter heat insulating member PL. length.

Further, in the intermediate portion other than the end portion adjacent to the cylindrical tube 1 and the other end portion of the cylindrical tube 1, the heat insulating member P is arranged and mounted on the circumference of the cylindrical tube 1. The structure of the direction (hereinafter, simply referred to as the basic mounting structure) is the same, but the structure in which the heat insulating members P are arranged and arranged in the circumferential direction of the cylindrical tube 1 in the vicinity of the other end portion of the cylindrical tube 1 (hereinafter, simply referred to as an end mounting structure) is different from the basic mounting structure, and secondly, the basic mounting structure and the end mounting structure are sequentially described.

Further, the space between the flange F of the cylindrical tube 1 and the heat insulating member P is filled with a heat insulating material D such as glass wool, and is also on the upper portion of the flange F corresponding to the cylindrical tube 1. The space is the same as the basic installation structure, and the arc-shaped flange heat insulating member Q is provided in two layers.

(basic installation structure)
In the basic installation structure, as shown in FIG. 3, the heat insulating member P which is divided into a plurality of arc shapes (semicircular shape in the present embodiment) in the circumferential direction of the cylindrical tube 1 is after the end faces are butted together. In a state in which each of the plurality of opposing portions in the circumferential direction of the cylindrical tube 1 is located, a pair of adjacent connecting members 7 (see FIG. 5) are adjacent to each other along the axial direction of the cylindrical tube. The outer peripheral portion of the cylindrical tube 1 is provided in a state in which the end portions of the heat insulating member are coupled.
In addition, the length of the connecting member 7 is the same length as the length of the heat insulating member P in the axial direction, 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 the end portions of the heat insulating member that is connected by the connecting member 7, the engaging groove portion U of the connecting member 7 is directed from the end surface toward the cylindrical tube. The recessed groove portion 8 recessed in the circumferential direction forms a locking groove portion 8a that is recessed toward the radially outer side of the cylindrical tube 1 in the radially outer side portion of the cylindrical tube 1 of the recessed groove portion 8. .

Further, the connecting member 7 has a cross-sectional shape including a main body connecting portion 7A that is engaged with each of the recessed groove portions 8 of the end portions of the pair of heat insulating members, and a pair of cards that are engaged with the locking groove portion 8a. The form of the connecting portion 7a is stopped.

Therefore, in the basic installation structure, the semicircular heat insulating member P is arranged in the circumferential direction of the cylindrical tube 1 in the outer peripheral portion of the cylindrical tube 1, and the connecting member 7 is along the long side. The direction (the axial direction of the cylindrical tube 1) is moved, and the heat insulating member P is attached to the cylindrical tube 1 while being inserted into the recessed groove portion 8 of each of the end portions of the pair of heat insulating members. The outer peripheral part (please refer to Figure 5).

Specifically, first, the small-diameter heat insulating member PS is attached to the outer peripheral surface of the cylindrical tube 1, and second, 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 is placed. The PL is installed on the outer peripheral surface of the intermediate diameter heat insulating member PM.
In the state in which 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 semicircular shapes) connected by the connecting member 7 are formed. The plurality of heat insulating members P are formed in a plurality of (three) heat insulating wall portions formed in a cylindrical shape and having different diameters, and are provided on the outer peripheral portion of the cylindrical tube 1 in a state in which a plurality of layers are formed.

Further, the configuration is such that the opposite ends of the state in which the end faces of the small-diameter heat insulating member PS are butted against each other and the end faces in the state in which the end faces of the intermediate-diameter heat insulating members PM are butted together are in the cylindrical tube. The phase in the circumferential direction of 1 is different by 90 degrees; similarly, the opposing direction of the state in which the end faces of the intermediate-diameter heat insulating member PM are butted against each other is opposite to the state in which the end faces of the large-diameter heat insulating member PL are butted against 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 installed in a state in which the phases in the circumferential direction of the cylindrical tube 1 are different by 90 degrees.

(end mounting structure)
In the end mounting structure, 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 can be divided into two in the circumferential direction of the cylindrical tube 1. A part of the semicircular heat insulating member PA is used.
Further, the heat insulating member P is in a state in which the end faces abut each other, and the long connecting members B are along the axis of the cylindrical tube in the two opposing portions in the circumferential direction of the cylindrical tube 1. The core direction is provided on the outer peripheral portion of the cylindrical tube 1 in a state in which one of the adjacent ones is connected to the end of the heat insulating member.
Further, the length of the connecting member B is the same length as the length of the heat insulating member P in the axial direction, and the connecting member B is made of urethane resin similarly to the heat insulating member P.

In each of the pair of heat insulating member ends in the two opposing directions, the groove-shaped engaging portion V that is engaged with the connecting member B is recessed from the end surface 5 along the tangential direction of the cylindrical tube 1. The recessed portion 10 is formed in a form of a flat surface along the tangential direction of the cylindrical tube 1 in each of the inner side surface 10u and the outer side surface 10g which are arranged along the radial direction of the cylindrical tube 1.
In addition, the tangential direction of the cylindrical tube 1 in this description means the tangential direction of the cylindrical tube 1 located in the opposing direction in the state in which the end surface 5 of the pair of heat insulating members P is butted.

In addition, as shown by the imaginary line in FIG. 6, the recessed portion 10 is a lateral portion of the lateral position of the locking groove portion 8a which is positioned in the recessed groove portion 8 of the basic mounting structure. 8b is formed by cutting.
That is, in the present embodiment, the heat insulating member P having the concave groove portion 8 is formed; in the basic mounting form, the heat insulating member P is used as it is; in the end mounting structure, it is placed at The lateral side portion 8b at the lateral position of the locking groove portion 8a in the recessed groove portion 8 is cut away to form a square concave portion 10, and the heat insulating member P having the concave portion 10 is formed as a semicircular heat insulating member PA To use.

Further, the connecting member B in the two opposing portions is formed by forming a cross-sectional shape into a square shape having a flat surface as the elongated square body 11, and the flat surface is along the end portions of the pair of heat insulating members. The inner side surface 10u and the outer side surface 10g of each recessed portion 10.
Further, since the corner portion of the square-shaped recessed portion 10 is formed in an arc shape, the cross-sectional shape of the elongated square body 11 is, in detail, a rounded square shape.

Further, in the present embodiment, the elongated square body 11 having a square cross-sectional shape is formed of an elastically deformable material (urethane resin), and is used in the elongated square body 11 to As shown in Fig. 7, each of the pair of engaging portions 11A to which the adjacent concave portions 10 are engaged is formed with a slit 12 that separates the engaging portion 11A in the radial direction of the cylindrical tube.
Further, the elongated square body 11 has a thickness of about 15 mm, and the slit 12 has a width of about 2 mm.

Therefore, in the end mounting structure, the heat insulating member P is attached to the outer peripheral portion of the cylindrical tube 1 in the following order.
First, the elongated square body 11 is engaged with the concave portion 10 formed at both end portions of the heat insulating member P on one of the pair of heat insulating members P (semicircular heat insulating members PA) which are divided into two halves. In each of them.
Further, when the elongated square body 11 is engaged with the concave portion 10, the elongated square body 11 is moved in the longitudinal direction, and is engaged (inserted) in the concave portion 10 or in the elongated square shape. 11 is engaged with the concave portion 10 while moving in the concave direction of the concave portion 10.

Then, the heat insulating member P (semicircular heat insulating member PA) on one side of the elongated square body 11 is pressed against the outer peripheral portion of the cylindrical tube 1, and is attached.
Next, the other side heat insulating member P is moved so as to approach the cylindrical tube 1, and the end faces 5 of the pair of heat insulating members P are brought into contact with each other, and both ends of the heat insulating member P on the other side are provided. The concave portion 10 formed in the portion moves toward the tangential direction of the cylindrical tube 1 positioned in the opposing direction with respect to the elongated square body 11 which is engaged with both end portions of the heat insulating member P on one side Engage.

Specifically, first, the small-diameter heat insulating member PS is attached to the outer peripheral surface of the cylindrical tube 1, and second, 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 is placed. The PL is installed on the outer peripheral surface of the intermediate diameter heat insulating member PM.
In the state in which the small-diameter heat insulating member PS, the intermediate-diameter heat insulating member PM, and the large-diameter heat insulating member PL are installed, the semi-circular heat insulating member P (semicircular heat insulating member PA) which is divided into two parts is formed. A plurality of (three) heat insulating walls formed in a cylindrical shape and different diameters are provided on the outer peripheral portion of the cylindrical tube 1 in a state in which a plurality of layers are formed.

Further, in the same manner as the basic mounting structure, the opposing direction of the state in which the end faces of the small-diameter heat insulating member PS are butted against each other and the end faces of the intermediate-diameter heat insulating member PM can be brought into contact with each other. The phase in the circumferential direction of the cylindrical tube 1 is different by 90 degrees. Similarly, the opposite ends of the state in which the end faces of the intermediate-diameter heat insulating members PM are butted against each other are butted to the end faces in the large-diameter heat insulating member PL. In the opposite direction, in the form in which the phases in the circumferential direction of the cylindrical tube 1 are different by 90 degrees, the small-diameter heat insulating member PS, the intermediate-diameter heat insulating member PM, and the large-diameter heat insulating member PL are mounted.

(About adiabatic reinforcement structure)
In the present embodiment, an adiabatic reinforcing structure for reinforcing the heat insulating property between the plurality of heat insulating members P provided on the outer circumferential surface of the cylindrical tube 1, that is, the adjacent heat insulating members P, is provided.
In other words, the plurality of heat insulating members P installed on the outer circumferential surface of the cylindrical tube 1 are cooled and contracted by the low-temperature fluid flowing inside the cylindrical tube 1, and as a result, are formed between the adjacent heat insulating members P. Since the gap is likely to reduce the heat insulation, an adiabatic reinforcing structure with reinforcing heat insulation is provided.

The adiabatic reinforcing structure has an inner reinforcing structure which is provided for the heat insulating wall formed by the small diameter heat insulating member PS and the intermediate diameter heat insulating member PM, and the outer reinforcing structure for the heat insulating formed by the large diameter heat insulating member PL The wall is provided, and the inner reinforcing structure and the outer reinforcing structure are sequentially described below. In addition, in the first to sixth figures, the description of the adiabatic reinforcing structure is omitted.

(inside reinforcing structure)
As shown in Fig. 8, the inner reinforcing structure is a portion in which the end faces 5 of the pair of heat insulating members P arranged in the circumferential direction of the cylindrical tube 1 are in a state of being butted, and are airtight. Adhesive tape (moisture-proof butyl tape) 13, and the adjacent heat insulating member P in the portion where the side surface 6 of the heat insulating member P arranged in the axial direction of the cylindrical tube 1 is located in the butted state, A connecting body W including a pair of locking portions Wa is provided.

The configuration in which the connecting body W is attached to the adjacent heat insulating member P will be described. The connecting body W including the pair of locking portions Wa is a pair of small-diameter heat insulatingly arranged adjacent to each other in the axial direction of the cylindrical tube 1. The member PS and the outer surface portions of the pair of intermediate diameter heat insulating members PM which are adjacently arranged are provided so as to be inserted into the radially inner side of the cylindrical tube 1 respectively.
Further, a pair of small-diameter heat insulating members PS which are adjacently arranged in the axial direction of the cylindrical tube 1 and a pair of intermediate-diameter heat insulating members PM which are adjacently arranged are plural layers formed on the outer peripheral portion of the cylindrical tube 1. The cylindrical tube 1 of the (three-layer) heat insulating wall has a heat insulating wall on the inner side in the radial direction, and corresponds to a pair of heat insulating members P which are adjacently arranged in the axial direction of the cylindrical tube 1.

In the present embodiment, as shown in FIG. 9, the connecting body W is configured to include the locking portion Wa at both end sides in the width direction of the band-shaped member 14 that can be bent and deformed, and the connecting body W, The outer surface portion of the pair of heat insulating members P is attached in a wound state.
In other words, the belt-shaped member 14 is formed, for example, of a tarpaulin which is a vinyl-based material in which a woven fabric of polyester fibers is wrapped with a soft synthetic resin film, and is attached to the belt-shaped member 14 There is a locking portion Wa which is formed in a sharp shape by a synthetic resin.

Therefore, since the belt-shaped member 14 has no adhesiveness, the belt-shaped member 14 is wound around the outer surface portion of the pair of heat insulating members P, and then the wound strip-shaped member 14 is wound with a small width band having adhesiveness. 15, the configuration is such that the falling of the belt-shaped member 14 can be suppressed.

(outer reinforcing structure)
As shown in Fig. 8, the outer side reinforcing structure is configured such that a pair of large-diameter heat insulating members PL are arranged adjacent to each other in the axial direction of the cylindrical tube 1, and the adhesive tape is attached. The first leakage preventing member 16 is placed in a plurality of (two) in a state in which the end faces 5 of the plurality of (two) large-diameter heat insulating members PL arranged in the circumferential direction of the cylindrical tube 1 are butted. In each of the opposing portions, the strip-shaped second leakage preventing member 17 having adhesiveness is attached to the pair of large-diameter heat insulating members PL which are arranged adjacent to each other in the circumferential direction of the cylindrical tube 1.

Further, as apparent from the above description, the heat insulating wall formed by the large-diameter heat insulating member PL is thermally insulated on the outermost side in the radial direction of the cylindrical tube 1 among the plurality of (three) heat insulating walls. wall.

Furthermore, in the present embodiment, the third leakage preventing body 18 having an adhesive quadrangular shape is attached to the entire outer peripheral surface of the large-diameter heat insulating member PL, and the heat insulating performance is improved.
Further, the first leakage preventing member 16, the second leakage preventing member 17, and the third leakage preventing member 18 are configured, for example, by applying a support to which the aluminum foil and the glass wool are bonded together. A tape (ALGC tape) with a rubber adhesive that is excellent in adhesion.

In addition, the respective adhesion order of the first leakage preventing member 16, the second leakage preventing member 17, and the third leakage preventing member 18 is first placed next to the third leakage preventing member 18, followed by It is preferable that the second leakage preventing member 17 is attached to the second leakage preventing member 17 and finally the first leakage preventing member 16 is attached.

[Second Embodiment]
Next, the second embodiment will be described. However, in the second embodiment, the form of the slit 12 formed in the elongated square body 11 is different from that of the first embodiment, and the other configuration is the same as that of the first embodiment. Therefore, only the portions 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 Fig. 10 and Fig. 11, in the second embodiment, the card is formed on only one of the engaging portions 11A of one of the pair of engaging portions 11A. The joint portion is directed toward the radially separated slit 12 of the cylindrical tube 1.
In other words, in the first embodiment, the slit 12 is formed in each of the pair of engaging portions 11A in the elongated square body 11. However, in the second embodiment, only one pair is engaged. The engagement portion 11A on one of the portions 11A forms the slit 12, which is different from the first embodiment.

In the second embodiment, first, the long square body 11 is engaged with two heat insulating members P on one side of a pair of semi-circular heat insulating members P (semicircular heat insulating members PA) divided into two parts. When each of the recessed portions 10 formed at the end portions is engaged, the engaging portion 11A of the slit 12 is not engaged.
Further, when the elongated square body 11 is engaged with the concave portion 10, the elongated square body 11 is moved in the longitudinal direction, and is engaged (inserted) in the concave portion 10 or in the elongated square shape. 11 is engaged with the concave portion 10 while moving in the concave direction of the concave portion 10.

Then, the heat insulating member P that has been engaged with one of the elongated square bodies 11 is pressed against the outer peripheral portion of the cylindrical tube 1, and is attached.
Then, the other side heat insulating member P is moved so as to approach the cylindrical tube 1, and the end faces of the pair of heat insulating members P are butted together, and both ends of the heat insulating member P on the other side are placed. In the recessed portion 10 formed, the engaging portion 11A in which the slit 12 is formed in the elongated square body 11 that has been engaged with the both end portions of the heat insulating member P on one side is oriented toward the circle in the opposing direction The tangential direction of the bobbin 1 is moved and engaged.

[Third embodiment]
Next, the third embodiment will be described. However, in the third embodiment, the configuration of the connecting member B in the end mounting structure is different from that of the first embodiment, and the other configuration is the same as that of the first embodiment. Only the portions 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, the outer diameter of the cylindrical tube 1 is about 30 mm. In the third embodiment, the outer diameter of the cylindrical tube 1 is a large diameter of about 300 mm. Therefore, the heat insulating member P is formed as 90 degree arc shape.

In the basic installation structure of the third embodiment, as shown in Fig. 12, in the same manner as in the first embodiment, the heat insulating member P is formed in a plurality of layers in a state of being connected by the connecting member 7. 3 layers) The insulation is installed by the wall.

Further, in the end mounting structure, as shown in Figs. 13 and 14, the semicircular heat insulating member PA which is divided into two portions in the circumferential direction of the cylindrical tube 1 is a basic mounting structure. The connecting member 7 used is configured by connecting two heat insulating members P formed in a 90-degree circular arc shape.

In other words, the semicircular heat insulating member PA which is divided into two in the circumferential direction of the cylindrical tube is placed in each of two opposing directions in the circumferential direction of the cylindrical tube 1 in a state in which the end faces are opposed to each other, The long connecting member B along the axial direction of the cylindrical tube 1 is provided in a state in which the ends of the adjacent pair of heat insulating members are joined.

One of the one of the two opposing portions faces the end of the heat insulating member, and the groove-shaped engaging portion V that is engaged with the connecting member B is formed along the circumferential direction of the cylindrical tube 1. A cut-away portion 20 having a square shape cut away from the inner side portion of the cylindrical tube 1 at the end of the heat insulating member is formed on the radially outer side portion of the cylindrical tube 1 of the cut-off portion 20 The locking concave portion 20a that is recessed toward the radially outer side of the cylindrical tube 1 is formed.

Further, in one of the other two of the two opposing portions, the groove-shaped engaging portion V that is engaged with the connecting member B in each of the end portions of the heat insulating member is the same as in the first embodiment described above. The recessed portion 10 recessed from the end surface 5 along the tangential direction of the cylindrical tube 1 is formed so as to surround each of the inner side surface 10u and the outer side surface 10g which are arranged along the radial direction of the cylindrical tube 1 The bobbin 1 is formed in the form of a flat surface in the tangential direction.
In addition, the tangential direction of the cylindrical tube 1 in this description means the tangential direction of the cylindrical tube 1 in the opposing position in the state in which the end surface 5 of the pair of heat insulating members P is butted.

The square-shaped cutout portion 20, as shown by the phantom line in Fig. 13, is placed on the lower side of the recessed groove portion 8 (in the radial direction of the cylindrical tube 1) in the basic mounting structure. The lower side portion 8c at the position of the square side is cut away, and is formed in a form in which the locking groove portion 8a is used as the locking recess portion 20a.
Further, as shown in the imaginary line in Fig. 13, the recessed portion 10 is a locking groove portion 8a which is placed in the recessed groove portion 8 in the basic mounting structure as in the first embodiment. The lateral side portion 8b of the lateral side position is cut and formed.

That is, in the present embodiment, the heat insulating member P having the concave groove portion 8 is formed, and the heat insulating member P is directly used in the basic mounting form.
In the end portion mounting structure, the lower side of the recessed groove portion 8 at the end portion of the heat insulating member P on one of the heat insulating members P connected to one of the heat insulating members P is connected to the end portion. The portion 8c is cut out to form the cut-away portion 20, and the lateral portion 8b at the lateral position of the locking groove portion 8a of the concave groove portion 8 located at the end portion of the heat insulating member P on the other side is cut away. The square recessed portion 10 is used as the semicircular heat insulating member PA in the pair of heat insulating members P formed by the cut portion 20 and the recessed portion 10.

Further, as shown in Fig. 15, the connecting member B at one of the two opposing portions is formed to have a cross-sectional shape including a cutout portion 20 which can be formed in a shape of each of the pair of heat insulating member ends. The main body portion 21A having the square shape and the pair of locking convex portions 21a engageable with the locking recess portion 20a are formed into an M-shaped elongated M-shaped member 21 in this cross-sectional shape.

In the same manner as in the first embodiment, the connecting member B is formed in a square shape having a flat surface as a long square body 11 as in the first embodiment. The flat surface is along the inner side surface 10u and the outer side surface 10g of each of the recessed portions 10 at the end portions of the pair of heat insulating members.

In the third embodiment, in a state in which the end faces of the semicircular heat insulating members PA divided into two parts are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1, The state in which the end portions of the adjacent heat insulating members are joined by the connecting member B is performed in the following order.
First, the long M-shaped member 21 and the elongated square body 11 are engaged with each other at the both end portions of the semicircular heat insulating member PA on one side of the pair of semicircular heat insulating members PA divided into two parts. Each of the parts V.
In other words, the long M-shaped member 21 is engaged with the engaging portion V formed by the cutout portion 20 having the shape of the locking recess 20a, and the elongated rectangular body 11 is engaged with The engaging portion V formed by the concave portion 10 whose end surface is recessed in the tangential direction of the cylindrical tube.

Then, the semicircular heat insulating member PA that has been engaged with one of the long M-shaped members 21 and the elongated square body 11 is attached to the outer peripheral portion of the cylindrical tube 1 to be mounted.
Then, the engaging portion V formed on one end side of the other side of the semicircular heat insulating member PA, that is, the cut portion provided as the locking recess portion 20a is provided in the elongated M-shaped member 21 The engaging portion V formed in the 20th direction is engaged with the cylindrical tube 1 in a direction from the outer side corresponding to the cylindrical tube 1.

Then, with respect to the elongated square body 11, the engaging portion V formed on the other end side of the semicircular heat insulating member PA on the other side is recessed as a tangential direction from the end surface 5 toward the cylindrical tube 1. In the state in which the end faces of the pair of semicircular heat insulating members PA are butted, the engaging portions V formed by the recessed portions 10 are moved toward the tangential direction of the cylindrical tube 1 in the opposing direction and are engaged with each other.

In such a state, in a state in which the end faces of the semicircular heat insulating members PA divided into two parts are butted against each other, the connecting members B are provided for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1. The end portions of the adjacent heat insulating members are connected to each other. Therefore, even if there is no space corresponding to the length of the connecting member B at one side in the axial direction of the cylindrical tube 1 in the semicircular heat insulating member PA, it can be mounted. Set the connecting member.

Further, in the basic mounting structure, when the connecting member 7 is detached and the heat insulating member P is removed for inspection of the cylindrical tube 1, etc., the portion where the concave groove portion 8 of the heat insulating member P is damaged may be damaged. In such a case, the lower portion 8c positioned below the concave groove portion 8 may be cut away to form the cut portion 20, and the connecting member 7 may be replaced by the long M-shaped member 21 connecting the heat insulating member P.

[Fourth embodiment]
Next, the fourth embodiment will be described. However, in the fourth embodiment, the configuration of the connecting member B in the end mounting structure is different from that of the third embodiment, and other configurations are the same as those in the third embodiment. Only the portions different from the third embodiment will be described, and the description of the same configuration as the third embodiment will be omitted.

In other words, the semicircular heat insulating member PA which is divided into two parts in the circumferential direction of the cylindrical tube 1 is two heat insulating bodies formed by arcs of 90 degrees by the connecting member 7 used in the basic mounting structure. The members P are connected to each other.
In other words, the semicircular heat insulating members PA which are divided into two in the circumferential direction of the cylindrical tube are each located at two opposing directions in the circumferential direction of the cylindrical tube 1 in a state in which the end faces are butted against each other. The long connecting member B is provided in a state in which the adjacent pair of heat insulating members P are coupled along the axial direction of the cylindrical tube 1.

In each of the two opposing portions, the end portion of the heat insulating member, the groove-shaped engaging portion V that is engaged with the connecting member B is such that the circumferential direction of the cylindrical tube 1 is at the end of the heat insulating member. The cut-away portion 20 having the inner side portion in the radial direction of the cylindrical tube 1 is cut away from the radially outer side portion of the cylindrical tube 1 of the cut portion 20, and is formed to face the cut portion The form of the locking recessed portion 20a in which the radially outer side portion of the cylindrical tube 1 of 20 is recessed.

That is, in the present embodiment, the heat insulating member P having the concave groove portion 8 is formed, and the heat insulating member P is directly used in the basic mounting form.
Further, in the end mounting structure, the lower side portion 8c positioned at the lower side of the recessed groove portion 8 at one of the positions of the end portions of the heat insulating member P connected by the connecting member 7 is cut off to form a cut. In the portion 20, the pair of heat insulating members P formed by the cutout portion 20 are used as the semicircular heat insulating member PA (please refer to Fig. 13).

In addition, the connecting member B in the two opposing portions is formed to have a square-shaped main body portion 21A that can be engaged with the cut-away portion 20 of each of the pair of heat insulating member ends, and In the form of a pair of locking convex portions 21a that are engaged with the locking recesses 20a, the cross-sectional shape is formed into an M-shaped elongated M-shaped member 21 (refer to Fig. 15).

In the fourth embodiment, in a state in which the end faces of the semicircular heat insulating members PA divided into two parts are in contact with each other, for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1, The state in which the end portions of the adjacent heat insulating members are connected by the connecting member B is performed in the following order.
First, the long M-shaped member 21 is engaged with each of the engaging portions V formed at both end portions of the semicircular heat insulating member PA on one of the pair of semicircular heat insulating members PA divided into two parts. .
In other words, the long M-shaped member 21 is engaged with the engaging portion V formed as the cutout portion 20 having the square shape of the locking recess portion 20a.

Then, the semicircular heat insulating member PA that has been engaged with one of the long M-shaped members 21 is attached to the outer peripheral portion of the cylindrical tube 1 to be attached.
Then, the engaging portion V formed on one end side of the other side of the semicircular heat insulating member PA, that is, the square shape having the locking recess 20a, is formed on one of the elongated M-shaped members 21 The engaging portion V formed by the cut-away portion 20 is engaged while moving in a direction approaching the cylindrical tube 1 from the outer side corresponding to the cylindrical tube 1.

Then, with respect to the long M-shaped member 21 on the other side, the engaging portion V formed on the other end side of the other-side semicircular heat insulating member PA, that is, the side having the locking recess 20a The engaging portion V formed by the cut portion 20 of the shape is engaged while moving in a direction approaching the cylindrical tube 1 from the outer side corresponding to the cylindrical tube 1.

In addition, when the engaging portion V formed on the other end side of the semicircular heat insulating member PA on the other side moves in a direction close to the cylindrical tube 1 from the outer side corresponding to the cylindrical tube 1, the other is The semicircular heat insulating member PA on one side is elastically deformed so as to expand and contract in the radial direction of the cylindrical tube 1.

In such a state, in a state in which the end faces of the semicircular heat insulating members PA divided into two parts are butted against each other, the connecting members B are provided for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1. By connecting the end portions of the adjacent pair of heat insulating members, even if there is no space corresponding to the length of the connecting member B at one side in the axial direction of the cylindrical tube 1 in the semicircular heat insulating member PA, Install the connecting member (please refer to Figure 16).

[Other Embodiments]
Hereinafter, other embodiments will be listed.
(1) In the above-described embodiment, the heat insulating member P is exemplified as a case where the heat insulating member P is divided into two semicircles in the circumferential direction of the cylindrical tube 1, or is divided into four portions, but the present invention is not limited thereto. In the basic mounting structure, the heat insulating member P may be divided into three parts or divided into five or more portions along the circumferential direction of the cylindrical tube 1. Further, in the end mounting structure, the heat insulating member P may be further disposed. It is divided into six or more even numbers along the circumferential direction of the cylindrical tube 1, and these are connected to form a semicircular semicircular heat insulating member PA.

(2) In the above embodiment, the heat insulating member P is attached to the outer peripheral portion of the cylindrical tube 1 by the basic mounting structure and the end mounting structure. However, the end portion may be attached. The structure and the form in which the heat insulating member P is attached to the entire length of the cylindrical tube 1 are implemented.

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

(4) In the above embodiment, the urethane resin is used as the material of the heat insulating member P, but the material of the heat insulating member P is not limited thereto. For example, a synthetic resin such as polyethylene resin or nitrile rubber (NBR) or a natural resin such as natural rubber (NR) may be used as the material of the heat insulating member P. Similarly, a synthetic resin such as polyethylene resin or nitrile rubber (NBR) or a natural resin such as natural rubber (NR) may be used as the material of the connecting member B and the connecting member 7.

(5) In the above-described embodiment, the insulating wall of the plurality of layers is exemplified as the heat insulating wall of the plurality of layers in the outer peripheral portion of the cylindrical tube 1. However, the heat insulating wall of the two layers may be formed. In addition, it is also possible to form four or more layers of heat insulating walls.

(6) In the above embodiment, the slit 12 is formed in the elongated square body 11 as the connecting member B. However, the slit 12 may be omitted.

(7) In the above embodiment, the connecting member B is formed by the elongated square body 11 having a square cross section, and the connecting member B has the recessed portion 10 including the inner side surface 10u and the outer side surface 10g. In the case of the flat surface of the engagement, the cross-sectional shape of the connecting member B having a flat surface may be formed such that the both end sides are tapered and formed into a convex elongated body. The cross-sectional shape of the connecting member B having a flat surface is variously changed.

Further, the configuration disclosed in the above embodiment (including other embodiments, the same applies hereinafter) can be applied in combination with the configuration disclosed in the other embodiments without causing a contradiction, and is disclosed in the present specification. The embodiment is merely illustrative, and the embodiment of the present invention is not limited thereto, and can be appropriately changed without departing from the scope of the invention.

1‧‧‧Cylinder tube

5‧‧‧ end face

7‧‧‧Connected components

7a‧‧‧Lock connection

8‧‧‧ recessed ditch

8a‧‧‧ Carding groove

10‧‧‧ recessed

12‧‧‧Slit

20‧‧‧Resection

20a‧‧‧Recessed recess

21A‧‧‧ Body Department

21a‧‧‧Snap convex

B‧‧‧Connecting components

D‧‧‧Insulation

F‧‧‧Flange

P‧‧‧Insulation member

PA‧‧‧Semicircular insulation member

PL‧‧‧large diameter insulation components

PM‧‧‧Intermediate diameter insulation components

PS‧‧‧Small diameter insulation components

Q‧‧‧Insulation members for flanges

U‧‧‧Kap

V‧‧‧Clock Department

Fig. 1 is a longitudinal sectional side view showing a state in which the heat insulating member is mounted.

Fig. 2 is a cutaway perspective view showing a state in which the heat insulating member and the semicircular heat insulating member are mounted.

Fig. 3 is a view as seen from the direction of the arrow line III-III in Fig. 1.

Fig. 4 is a view taken from the direction of the arrow of the IV-IV line in Fig. 1.

Fig. 5 is an exploded perspective view showing the relationship between the connecting member and the heat insulating member.

Fig. 6 is a front elevational view showing the relationship between the connecting member and the semicircular heat insulating member.

Figure 7, a perspective view of the connecting member.

Fig. 8 is a perspective view showing a mounting form of the connecting body.

Fig. 9 is an enlarged perspective view of the connected body.

Fig. 10 is a front elevational view showing the mounting form of the semicircular heat insulating material of the second embodiment.

Fig. 11 is a perspective view showing the connecting member of the second embodiment.

Fig. 12 is a front elevational view showing the mounting form of the heat insulating member of the third embodiment.

Fig. 13 is a front elevational view showing the relationship between the semicircular heat insulating member and the connecting member of the third embodiment.

Fig. 14 is a front elevational view showing the mounting form of the semicircular heat insulating member of the third embodiment.

Fig. 15 is a perspective view showing the connecting member of the third embodiment.

Fig. 16 is a front elevational view showing the mounting form of the semicircular heat insulating member of the fourth embodiment.

Fig. 17 is a front elevational view showing the mounting form of the heat insulating member of the comparative example.

Fig. 18 is an exploded perspective view showing the mounting form of the heat insulating member of the comparative example.

Claims (8)

The heat insulating structure for a cylindrical tube is a semicircular heat insulating member which is divided into two parts in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and is positioned in a state in which the end faces are butted against each other. Each of the two opposing portions of the cylindrical tube in the circumferential direction is provided with a long connecting member in a state in which one of the adjacent heat insulating member ends is connected along the axial direction of the cylindrical tube. The cylindrical tube is insulated structure and is characterized by: One of the one of the two opposing portions faces the end of the heat insulating member, and the groove-shaped engaging portion that is engaged with the connecting member is formed along the circumferential direction of the cylindrical tube. a cut-out portion that is cut out at an inner side portion of the cylindrical tube at an end portion of the heat insulating member, and a radially outward side portion of the cylindrical tube of the cut-off portion is formed to face the cylinder a form of a locking recess recessed in a radially outer side of the tube; The connecting member in one of the two opposing portions is formed to have a cross-sectional shape including a main body portion that engages with each of the pair of the heat insulating member end portions, and the card portion a form of a pair of locking projections that are engaged with the recess; One of the other of the two opposing portions faces the end of the heat insulating member, and the groove-shaped engaging portion that is engaged with the connecting member is such that the end surface is along the cylindrical tube a recessed portion recessed in the tangential direction, wherein each of the inner side surface and the outer side surface arranged along the radial direction of the cylindrical tube is formed along a flat surface in a tangential direction of the cylindrical tube; The connecting member in the other of the two opposing directions is formed in a shape having a flat surface having a flat surface, and the flat surface is the concave along each of the ends of the pair of the heat insulating members The inner side and the outer side of the entrance. The heat insulating structure for a cylindrical tube is a semicircular heat insulating member which is divided into two parts in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and is positioned in a state in which the end faces are butted against each other. Each of the two opposing portions of the cylindrical tube in the circumferential direction is provided with a long connecting member in a state in which one of the adjacent heat insulating member ends is connected along the axial direction of the cylindrical tube. The cylindrical tube is insulated structure and is characterized by: In each of the pair of the heat insulating member ends of the two opposing portions, the groove-shaped engaging portion that is engaged with the connecting member is disposed at the end of the heat insulating member along the circumferential direction of the cylindrical tube a cut-out portion in which the inner side portion of the cylindrical tube in the radial direction is cut out is formed on the radially outer side portion of the cylindrical tube of the cut portion so as to face the outer side in the radial direction of the cylindrical tube a form of a recessed recess for recessing; The connecting member in the two opposing portions is formed to have a cross-sectional shape including a main body portion that engages with the cutout portion of each of the pair of the heat insulating member ends, and the engagement portion with the locking recess portion The form of a pair of locking projections. The heat insulating structure for a cylindrical tube is a semicircular heat insulating member which is divided into two parts in the circumferential direction of the cylindrical tube in the outer peripheral portion of the cylindrical tube through which the low temperature fluid flows, and is positioned in a state in which the end faces are butted against each other. Each of the two opposing portions of the cylindrical tube in the circumferential direction is provided with a long connecting member in a state in which one of the adjacent heat insulating member ends is connected along the axial direction of the cylindrical tube. The cylindrical tube is insulated structure and is characterized by: In each of the pair of the heat insulating member end portions of the two opposing portions, the groove-shaped engaging portion that is engaged with the connecting member is recessed from the end surface along the tangential direction of the cylindrical tube a recessed portion formed in a shape of a flat surface along a tangential direction of the cylindrical tube, each of an inner side surface and an outer side surface arranged along a radial direction of the cylindrical tube; The connecting member in the two opposing portions has a cross-sectional shape formed to have a flat surface, and the flat surface is the inner side surface of the concave portion along each of the pair of the heat insulating member end portions and Outer side. The heat insulating structure for a cylindrical tube according to claim 1 or 3, wherein The connecting member having a shape having a flat surface is formed of an elastically deformable material, and an engaging portion of one of a pair of engaging portions for engaging with the adjacent concave portion in the connecting member is A slit that separates the engaging portion toward the radial direction of the cylindrical tube is formed. The heat insulating structure for a cylindrical tube according to claim 1 or 3, wherein The connecting member having a shape having a flat surface is formed of an elastically deformable material, and each of the pair of engaging portions of the connecting member for engaging with the adjacent concave portion is formed with the card The combined portion faces the radially separated slit of the cylindrical tube. The heat insulating structure for a cylindrical tube according to any one of claims 1 to 5, wherein A plurality of heat insulating walls having a cylindrical shape and different diameters formed by the semi-circular heat insulating members divided into two parts are provided on the outer peripheral portion of the cylindrical tube in a state in which a plurality of layers are formed. The heat insulating structure for a cylindrical tube according to any one of claims 1 to 6, wherein The installation of the semicircular heat insulating member connected by the connecting member in the outer peripheral portion of the cylindrical tube is adjacent to the circumferential direction of the cylindrical tube in the circumferential direction of the cylindrical tube a plurality of arc-shaped heat insulating members are disposed in a plurality of opposing positions in a circumferential direction of the cylindrical tube in a state in which the end faces are butted against each other, and a long connecting member is used along the cylinder The axial direction of the tube is set in a state in which the ends of the adjacent pair of heat insulating members are joined; Each of the end portions of the heat insulating member is connected to one end of the heat insulating member by the connecting member, and the engaging groove portion of the connecting member is a concave groove portion that is recessed from the end surface toward the circumferential direction of the cylindrical tube. The radially outer side portion of the cylindrical tube of the recessed groove portion is formed to have a locking groove portion that is recessed toward the radially outer side of the cylindrical tube; The connecting member includes a main body connecting portion that is engaged with the recessed groove portion of each of the pair of the heat insulating member ends, and a pair of locking connecting portions that are engaged with the locking groove portion. The form. An insulating structure for a cylindrical tube according to the seventh aspect of the invention, wherein a plurality of heat insulating wall portions in a cylindrical shape and different diameters formed by a plurality of arc-shaped heat insulating members connected by the connecting member are provided in the cylindrical tube in a state in which a plurality of layers are formed The outer perimeter.