TWI787395B - Insulation structure for cylindrical pipe - Google Patents

Abstract

The present invention is to provide a heat insulating structure for a cylindrical pipe, which can install the connecting member and the heat insulating member even if there is no space corresponding to the length of the connecting member at one side of the cylindrical pipe axial center in the heat insulating member. The state that the engagement is hard to come off. The solution of the present invention is: the semicircular heat insulating member is installed on the cylinder in a state where the ends of the adjacent pair of heat insulating members are connected by a pair of elongated connecting members along the axial direction of the cylindrical tube. The outer peripheral portion of the pipe; the connection member at one side is formed in a cross-sectional shape to include: a body portion that engages with the cutout portion of each of the end portions of the pair of heat insulating members; The form of a pair of locking convex parts engaged with the concave part; the connecting member on the other side is formed in a cross-sectional shape with a flat surface, and the flat surface is along the middle of each of the end parts of the pair of heat insulating members. The inner and outer sides of the concave part.

Description

Insulation structure for cylindrical pipe

The present invention relates to a heat insulating structure for a cylindrical pipe, which is a semicircular heat insulating member that divides the circumferential direction of the cylindrical pipe into two parts on the outer peripheral portion of the cylindrical pipe through which a low-temperature fluid flows, and in a state where the end faces are butted against each other. In each of the two opposite positions located in the circumferential direction of the above-mentioned cylindrical tube, the ends of a pair of adjacent heat insulating members are connected by a long connecting member along the axial direction of the above-mentioned cylindrical tube. set up.

The thermal insulation structure for the cylindrical tube is to cover the outer peripheral part of the cylindrical tube through which the low-temperature fluid such as LNG or LPG flows with the thermal insulating member, and to insulate the cylindrical tube, and usually, the circular tube is wrapped with the thermal insulating member. The outer peripheral portion of the bobbin is covered in plural layers (for example, 2 or 3 layers). Also, when covering the cylindrical pipe in a plurality of layers, heat insulating members having different diameters are stacked concentrically and installed.

As a previous example of a heat insulating structure for a cylindrical pipe, at each of the ends of a pair of heat insulating members connected by a connecting member, a groove-shaped engaging portion for engaging the connecting member is formed so that the end of the heat insulating member The end surface of the concave groove is concave toward the circumferential direction of the cylindrical tube, and is formed with a groove for locking. The groove for locking is formed on the radially outer side of the cylindrical tube of the concave groove. The radially outer side of the bobbin is recessed, and the connecting member is formed in a cross-sectional shape to include: a main body connecting portion that engages with the recessed grooves at the end portions of the pair of heat insulating members, and a locking groove that engages A form of a pair of locking connection parts (for example, please refer to Patent Document 1). [Prior Art Literature] [Patent Document]

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

[Problem to be solved by the invention]

Cylindrical tubes are generally formed in a state in which flanges for connection are provided at both ends, and by flange-connecting a plurality of cylindrical tubes, a flow path through which a low-temperature fluid flows is formed. There are cases where the connection flange of the cylindrical pipe is connected to a valve body such as an on-off valve. In addition, when installing the heat insulating member on the outer peripheral portion of the cylindrical pipe, the heat insulating member having a predetermined length is sequentially installed in the axial direction of the cylindrical pipe from one end of the cylindrical pipe to the other end. superior.

That is, at the place adjacent to one end of the cylindrical tube, the semicircular heat insulating members divided into two parts in the circumferential direction of the cylindrical tube are arranged in the circumferential direction of the cylindrical tube in a state where the end faces are butted together. In the state where the elongated connecting member is moved in the longitudinal direction, it is engaged (inserted) in the recessed groove formed at each end of the pair of heat insulating members to install the heat insulating member, and then , at the place adjacent to the installed heat insulating member, proceed from one end of the cylindrical tube to the other end in sequence: divide the semicircular heat insulating member into two parts in the circumferential direction of the cylindrical tube, and make the end face The butted state is aligned in the circumferential direction of the cylindrical tube. In this state, the elongated connecting member is engaged (inserted) in the end of the pair of heat insulating members while moving in the longitudinal direction. The recessed grooves formed in each of the parts are used to install the heat insulating member.

However, the heat insulating member is installed sequentially from one end of the cylindrical pipe toward the other end, and finally, when the heat insulating member is installed to a place adjacent to the other end of the cylindrical pipe, the cylindrical pipe The flange at the other end will be in a state of blocking the recessed grooves formed by each of the ends of the pair of heat insulating members, so that the flange is in the way, and the long connecting member cannot be moved on the long side. direction, one side is engaged (inserted) with: the recessed groove part formed in each of a pair of end part of a heat insulating member.

That is, to enable the elongated connecting member to engage (insert) into the recessed grooves formed at the ends of the pair of heat-insulating members while moving in the longitudinal direction, it is necessary to be in the heat-insulating member On one side of the cylindrical tube in the axial direction, there must be a space equivalent to the length of the connecting member, but when the heat insulating member is installed adjacent to the other end of the cylindrical tube, due to the If there is no edge, it becomes impossible to secure a space equivalent to the length of the connecting member.

Furthermore, a gap will be formed between the flange of the other end of the cylindrical tube and the heat insulating member. However, in this case, there is a fear that the elongated connecting member may be broken and cannot be engaged (inserted) in the concave groove.

Therefore, as shown in FIG. 17 and FIG. 18, it is considered that the end faces of the semicircular heat insulating member P divided into two parts in the circumferential direction of the cylindrical tube 1 face each other in each of the ends of the pair of heat insulating members. , and form the step-like fitting part Z which becomes step-like along the radial direction of the cylindrical tube 1 . In addition, in Fig. 17 and Fig. 18, the case where the heat insulating member is installed in three layers is illustrated.

However, in this case, since the types of heat insulating members P having step-shaped fitting portions Z increase, not only production and management become more cumbersome, but even if the step-like fitting portions Z at the ends of a pair of heat insulating members are fitted, the Fitting is also easy to come off, and there is a problem that it is difficult to attach the heat insulating member P satisfactorily. That is, since the step-shaped fitting portion Z at the ends of the pair of heat insulating members is in a fitted state, since the fitted state is basically maintained by frictional force, the fitting is easy to come off.

The present invention was developed in view of the above-mentioned actual situation, and its object is to provide a heat insulating structure for a cylindrical pipe, even if there is no space equivalent to the length of the connecting member at one side of the cylindrical pipe axial center in the heat insulating member. , the connecting member can still be installed in a state where it is hard to fall off when engaged with the heat insulating member. [means used to solve problems]

The heat insulating structure for a cylindrical pipe of the present invention is a state in which end faces of a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe are butted against each other on the outer peripheral portion of the cylindrical pipe through which the cryogenic fluid flows. In the lower position, at each of the two facing positions in the circumferential direction of the above-mentioned cylindrical pipe, the ends of the heat-insulating member are connected to each other by a long connecting member along the axial direction of the above-mentioned cylindrical pipe. The installed heat insulation structure for cylindrical pipes is characterized in that: In each of the end portions of the heat insulating member at one side of the two opposing positions, the groove-shaped engaging portion for engaging the connecting member is formed so that The cutout part after cutting the radially inner side part of the above-mentioned cylindrical tube at the end part of the above-mentioned heat insulating member is formed on the radially outer side part of the above-mentioned cylindrical tube of the cutout part, with a The shape of the locking recesses that are recessed on the radially outer side of the pipe; The connecting member at one side of the two facing locations has a cross-sectional shape that includes a main body portion that engages with the cutout portion of each of the end portions of the pair of heat insulating members, and a body portion that engages with the locking member. The shape of a pair of locking convex parts engaged with the concave parts; In each of the end portions of the heat insulating member at the other side of the two opposing positions, as a groove-shaped engaging portion for engaging the connecting member, a groove-shaped engaging portion is formed along the cylindrical tube from the end surface. The concave part that is concave in the tangential direction of the above-mentioned cylindrical tube is formed in such a manner that each of the inner side surface and the outer side surface arranged along the radial direction of the above-mentioned cylindrical tube is set as a flat surface along the tangential direction of the above-mentioned cylindrical tube; The connecting member at the other side of the two facing locations has a cross-sectional shape having a flat surface along the concave portion of each of the ends of the pair of heat insulating members. The above-mentioned inner and outer sides of the entrance.

In addition, the above-mentioned tangential direction of the cylindrical tube means the tangential direction of the cylindrical tube in which the end faces of the pair of heat insulating members are positioned at opposing positions in a state where the end surfaces of the pair of heat insulating members are butted together.

That is, in the state where 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 tube, the adjacent pair of heat insulating members should be connected by the connecting member. When the member ends are in a connected state, for example, it can be performed by the following procedure. First, the connection member having the main body and the locking protrusion and the connection member having the shape of a flat surface are engaged with the two ends of the heat insulation member on one side of a pair of semicircular heat insulation members divided into two parts. In each of the formed engaging parts. Furthermore, the connecting member having the main body and the locking convex portion is engaged with: the engaging portion formed by the cutout portion having the recessed portion for locking; the connecting member having a shape of a flat surface is engaged. In: An engagement portion formed by a concave portion that is concave from the end surface toward the tangential direction of the cylindrical tube.

Then, the heat insulating member on one side after engaging the connecting member including the main body portion and the locking convex portion and the connecting member having a flat surface shape is attached to the outer peripheral portion of the cylindrical tube. Next, first, with respect to the connecting member having the body portion and the locking protrusion, the engaging portion formed on the one end side of the other heat insulating member, that is, the cutout portion having the locking concave portion is formed. The engaging portion of the cylindrical tube engages while moving in a direction approaching the cylindrical tube from a position corresponding to the outside of the cylindrical tube.

Next, with respect to the connecting member having a shape of a flat surface, the engagement portion formed on the other end side of the heat insulating member on the other side, that is, the recessed portion that is recessed from the end surface toward the tangential direction of the cylindrical tube The formed engaging portion engages while moving toward the tangential direction of the cylindrical tube located at the opposing position in a state where the end faces of the pair of heat insulating members are abutted.

In such a procedure, in the state where 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 tube, the adjacent pair of heat insulating members are connected by the connecting member. The ends of the members are connected so that even if there is no space corresponding to the length of the connecting member at one side of the cylindrical tube in the heat insulating member in the axial direction, the connecting member can still be installed.

And, make the engaging portion formed as the cutout portion provided with the recessed portion for locking, in the state after engaging the connection member having the main body portion and the convex portion for locking, the convex portion for locking will be recessed for locking. Locking, whereby the engagement between the connecting member including the main body portion and the locking convex portion and the engaging portion becomes difficult to fall off. In addition, in the state where the engaging portion formed as a recessed portion recessed from the end surface toward the tangential direction of the cylindrical tube is engaged with the connecting member having a flat surface, for example, even if the heat insulating member is intended to be attached to the main body When performing rotational movement centering on the engaging point of the connecting member with the locking convex part, the flat surface along the inner and outer surfaces of the concave part in the connecting member having a flat surface shape is aligned with the concave part. Each of the inner surface and the outer surface formed by the flat surface arranged along the radial direction of the cylindrical tube and along the tangential direction of the cylindrical tube of the concave portion performs abutting action to prevent the rotational movement, etc., whereby the The engagement between the connecting member having a flat surface shape and the engaging portion becomes difficult to come off.

In short, according to the heat insulating structure for a cylindrical pipe of the present invention, even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical pipe 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 come off.

The heat insulating structure for a cylindrical pipe of the present invention is a state in which end faces of a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe are butted against each other on the outer peripheral portion of the cylindrical pipe through which the cryogenic fluid flows. In the lower position, at each of the two facing positions in the circumferential direction of the above-mentioned cylindrical pipe, the ends of the heat-insulating member are connected to each other by a long connecting member along the axial direction of the above-mentioned cylindrical pipe. The installed heat insulation structure for cylindrical pipes is characterized in that: In each of the pair of end portions of the heat insulating member at the two opposing positions, as a groove-shaped engaging portion for engaging the connecting member, a groove-shaped engaging portion is formed so that the end of the heat insulating member along the circumferential direction of the cylindrical tube The cutout part after the radially inner part of the above-mentioned cylindrical tube is cut off, and the radially outer side of the above-mentioned cylindrical tube is formed on the radially outer side of the cutout part. The shape of the recessed part for locking; The above-mentioned connection member at the above-mentioned two facing positions has a cross-sectional shape formed to include: a main body portion that engages with the above-mentioned cutout portion of each of the pair of end portions of the above-mentioned heat insulating member, and the above-mentioned locking concave portion. The shape of a pair of locking protrusions.

That is, in the state where 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 tube, the adjacent pair of heat insulating members should be connected by the connecting member. When the member ends are in a connected state, for example, it can be performed by the following procedure. First, the connecting member including the body portion and the locking protrusion is engaged with each of the engaging portions formed at both ends of the heat insulating member on one side of a pair of semicircular heat insulating members divided into two.

Then, the heat insulating member on one side of the connection member having the main body and the locking protrusion engaged at both ends is attached to the outer peripheral portion of the cylindrical tube. Next, first, with respect to one of the pair of connection members provided with the main body portion and the locking convex portion, the locking portion formed by the heat insulating member on the other side, that is, the cutout portion provided with the locking concave portion is formed. The formed locking portion engages while moving in a direction approaching the cylindrical tube from a point corresponding to the outer side of the cylindrical tube.

Next, with respect to the other one of the pair of connecting members having the body part and the locking convex part, the engaging part formed on the other end side of the heat insulating member on the other side, that is, the engaging part provided with the concave part for locking The locking portion formed by the cutout portion engages while moving in a direction approaching the cylindrical tube from a position corresponding to the outside of the cylindrical tube.

Furthermore, when the engaging portion formed on the other end side of the other heat insulating member is moved in a direction approaching the cylindrical pipe from a position corresponding to the outside of the cylindrical pipe, the heat insulating member on the other side will Since the member is elastically deformed so as to expand and contract in the radial direction of the cylindrical tube, it is more suitable if the diameter of the heat insulating member is larger than the height of the locking protrusion.

In such a procedure, in the state where 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 tube, the adjacent pair of heat insulating members are connected by the connecting member. The ends of the members are connected so that even if there is no space corresponding to the length of the connecting member at one side of the cylindrical tube in the heat insulating member in the axial direction, the connecting member can still be installed.

And, make the engagement portion formed as the cutout portion provided with the recessed portion for locking, in the state after engaging the connection member provided with the main body portion and the convex portion for locking, the convex portion for locking is formed by the concave portion for locking. Locking, whereby the engagement between the connecting member including the main body portion and the locking convex portion and the engaging portion becomes difficult to fall off.

In short, according to the heat insulating structure for a cylindrical pipe of the present invention, even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical pipe 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 come off.

The heat insulating structure for a cylindrical pipe of the present invention is a state in which end faces of a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe are butted against each other on the outer peripheral portion of the cylindrical pipe through which the cryogenic fluid flows. In the lower position, at each of the two facing positions in the circumferential direction of the above-mentioned cylindrical pipe, the ends of the heat-insulating member are connected to each other by a long connecting member along the axial direction of the above-mentioned cylindrical pipe. The installed heat insulation structure for cylindrical pipes is characterized in that: In each of the pair of end portions of the heat insulating member at the two facing positions, a groove-shaped engaging portion for engaging the connecting member is recessed from the end surface along the tangential direction of the cylindrical tube. The concave portion is formed in such a manner that each of the inner side surface and the outer side surface arranged along the radial direction of the cylindrical tube is formed as a flat surface along the tangential direction of the cylindrical tube; The connecting member at the two opposing locations has a cross-sectional shape having a flat surface along the inner surface and the concave portion of each of the end portions of the pair of heat insulating members. outer side.

In addition, the above-mentioned tangential direction of the cylindrical tube means the tangential direction of the cylindrical tube in which the end faces of the pair of heat insulating members are positioned at opposing positions in a state where the end surfaces of the pair of heat insulating members are butted together.

That is, in the state where 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 tube, the adjacent pair of heat insulating members should be connected by the connecting member. When the member ends are in a connected state, for example, it can be performed by the following procedure. First, a connecting member having a shape of a flat surface is engaged with each of the engaging portions formed at both ends of the heat insulating member on one side of a pair of semicircular heat insulating members divided into two.

Then, the heat insulating member on one side of the connection member having the shape of a flat surface engaged with both ends is attached to the outer peripheral portion of the cylindrical tube. Next, the heat insulating member on the other side is moved so as to approach the cylindrical tube, and the connection members having a flat surface shape that are engaged with the two ends of the heat insulating member on one side are moved so that the heat insulating member formed on the other side The engaging portion at both ends of the heat insulating member, that is, the engaging portion formed by having a concave portion recessed from the end face toward the tangential direction of the cylindrical tube, is in a state where the end faces of the pair of heat insulating members are butted together. Move toward the tangential direction of the cylindrical tube located in the opposing place and engage on one side.

In such a procedure, in the state where 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 tube, the adjacent pair of heat insulating members are connected by the connecting member. The ends of the members are connected so that even if there is no space corresponding to the length of the connecting member at one side of the cylindrical tube in the heat insulating member in the axial direction, the connecting member can still be installed.

In addition, in the state where the engaging portion formed as the recessed portion recessed from the end surface toward the tangential direction of the cylindrical tube is engaged with the connecting member having a flat surface, for example, even if the heat insulating member is intended to be When the engaging part of the connecting member on one side is rotated as the center, the flat surface along the inner surface and the outer surface of the recessed part in the connecting member having a flat surface shape is aligned with the inner surface and the outer surface of the recessed part. Each of the inner and outer surfaces formed by the radially arranged flat surfaces of the cylindrical tubes along the tangential direction of the cylindrical tubes abuts to prevent the rotational movement, etc., thereby making the flat surface shape The engagement between the connecting member and the engaging portion becomes difficult to come off.

In short, according to the heat insulating structure for a cylindrical pipe of the present invention, even if there is no space corresponding to the length of the connecting member at one side in the axial direction of the cylindrical pipe 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 come off.

A further feature of the heat insulating structure for a cylindrical pipe 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 connecting member is configured to connect with the adjacent recess. The engaging portion on one side of the pair of engaging portions engaged with the inlet portion is formed with a slit that separates the engaging portion toward the radial direction of the cylindrical tube.

That is, due to the engaging portion on one side of the pair of engaging portions for engaging with the adjacent recessed portion in the connection member formed to have a shape of a flat surface, there is formed such that the engaging portion is directed toward the cylindrical tube. radially separated slits, so for example, an engaging portion without a slit formed in a pair of engaging portions of a connecting member is engaged with a heat insulating member installed earlier among a pair of insulating members. Then, the engaging portion of the heat insulating member installed later among the pair of heat insulating members is engaged with the engaging portion formed with the slit in one of the pair of engaging portions of the connecting member. By doing so, the engaging portion can be satisfactorily engaged with the engaging portion while elastically deforming the engaging portion in which the slit is formed.

That is, when the engaging portion with the slit is pressed in the radial direction, since the width along the radial direction of the cylindrical tube can be reduced by the formation of the slit, it is possible to form The engaging portion having the slit is elastically deformed so as to reduce the width along the radial direction of the cylindrical tube, and the engaging portion of the heat insulating member can be satisfactorily engaged with the engaging portion formed with the slit. .

Furthermore, the width of the engagement portion in which the slit is formed along the radial direction of the cylindrical tube is slightly larger than the width between the inner surface and the outer surface of the concave portion forming the engagement portion, so that When the engaging portion of the heat insulating member is engaged with the engaging portion formed with the slit, the contact between the inner surface and the outer surface of the concave portion forming the engaging portion and the engaging portion formed with the slit can be improved. Press and not easy to break away.

In short, according to the further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention, it is possible to satisfactorily perform the engaging portion of the heat insulating member installed later in the pair of heat insulating members: An engaging portion with a slit is formed in one of the pair of engaging portions.

A further feature of the heat insulating structure for a cylindrical pipe 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 connecting member is configured to connect with the adjacent recess. Each of the pair of engaging portions where the inlet portion engages is formed with a slit that separates the engaging portion toward the radial direction of the cylindrical tube.

That is, since in each of a pair of engaging portions for engaging with adjacent recessed portions in the connecting member formed in a shape having a flat surface, a radial separation of the engaging portions toward the cylindrical tube is formed. slit, so it can be well performed: one of the engaging parts of a pair of engaging parts in the connecting member is engaged with the engaging part of the heat insulating member installed earlier among the pair of heat insulating members, or The engaging portion of the heat insulating member installed later among the pair of heat insulating members is engaged with the remaining engaging portion of one of the pair of engaging portions of the connecting member.

That is, when the engaging portion with the slit is pressed in the radial direction, since the width along the radial direction of the cylindrical tube can be reduced by the formation of the slit, it is possible to form The engaging portion having the slit is elastically deformed so as to reduce the width along the radial direction of the cylindrical tube, and the engaging portion of the heat insulating member can be satisfactorily engaged with the engaging portion formed with the slit. .

Furthermore, the width of the engagement portion in which the slit is formed along the radial direction of the cylindrical tube is slightly larger than the width between the inner surface and the outer surface of the concave portion forming the engagement portion, so that When the engaging portion of the heat insulating member is engaged with the engaging portion formed with the slit, the contact between the inner surface and the outer surface of the concave portion forming the engaging portion and the engaging portion formed with the slit can be improved. Press and not easy to break away.

In short, according to the further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention, it is possible to satisfactorily engage the engaging portion of the heat insulating member with the pair of engaging portions of the connecting member.

A further characteristic configuration of the heat insulating structure for a cylindrical pipe according to the present invention is that a plurality of heat insulating walls having a cylindrical shape and different diameters formed by the above-mentioned heat insulating member divided into two parts in a semicircular shape form a plurality of layers. The state is provided on the outer peripheral portion of the above-mentioned cylindrical tube.

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

In short, according to the further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention, it is possible to suitably insulate the cylindrical pipe.

A still further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention is that, with respect to the location of the semicircular heat insulating member connected by the connecting member in the outer peripheral portion of the cylindrical pipe, between the cylindrical pipe The adjacent parts in the axial direction are divided into a plurality of arc-shaped heat insulating members in the circumferential direction of the above-mentioned cylindrical tube, and they are a plurality of facing in the circumferential direction of the above-mentioned cylindrical tube in a state where the end faces are butted against each other. In each of the positions, the ends of a pair of adjacent heat insulating members are connected along the axial direction of the above-mentioned cylindrical tube by using a long connecting member; In each of the pair of end portions of the above-mentioned heat insulating member connected by the above-mentioned connecting member, the engaging groove portion of the above-mentioned connecting member is a recessed groove portion that is recessed from the above-mentioned end surface toward the circumferential direction of the above-mentioned cylindrical tube, and The radially outer side portion of the cylindrical tube of the recessed groove portion is formed to have a groove for locking that is recessed toward the radially outer side of the cylindrical tube; The coupling member is formed in a cross-sectional shape and includes a main body coupling portion engaged with the recessed groove portion of each of the pair of end portions of the heat insulating member, and a pair of locking coupling portions engaged in the locking groove portion. form.

That is, install in order from one end of the cylindrical tube toward the other end: when the heat insulating member has a predetermined length in the axial direction of the cylindrical tube, it is adjacent to one end of the cylindrical tube, or At a certain distance from the other end of the cylindrical tube, an arc-shaped heat insulating member connected by a connecting member is installed, and finally, at the place adjacent to the other end of the cylindrical tube, a connecting The semicircular heat-insulating member to which the members are connected enables the heat-insulating member to be appropriately installed over the entire length of the cylindrical pipe.

Furthermore, when installing the arc-shaped heat insulating member connected by the elongated connecting member on the outer peripheral portion of the cylindrical pipe, the arc-shaped heat insulating member divided in the circumferential direction of the cylindrical pipe is In a state where the end faces are butted against each other and arranged in the circumferential direction of the cylindrical tube, the elongated connecting member is engaged (inserted) in each of the ends of the adjacent heat insulating members while moving in the longitudinal direction. The engaging groove formed in the middle is used to install the heat insulating member in this way.

Furthermore, as the engagement groove formed at each end of the heat insulating member connected by the connecting member, it is a recessed groove that is recessed from the end surface of the heat insulating member toward the circumferential direction of the cylindrical tube, and between the recessed grooves The radially outer side portion of the above-mentioned cylindrical tube is formed to have a locking groove recessed toward the radially outer side of the cylindrical tube. According to this form, the cross-sectional shape of the connecting member is formed to have: locking The form of the main body connecting part that fits in each recessed groove at the end of the heat insulating member, and a pair of locking connecting parts that engage in the locking groove, so the locking groove is locked by using the locking connecting part , and the adjacent heat insulating members can be properly connected, so when the heat insulating member is cooled by the low-temperature fluid circulating inside the cylindrical tube, the heat shrinkage of the heat insulating member can suppress the gap between the end faces of the adjacent cross-sectional members. Large gaps appear in between, and the cylindrical tube can be suitably insulated.

In short, according to the further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention, the heat insulating member can be properly installed over the entire length of the cylindrical pipe while the cylindrical pipe is properly insulated.

A further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention is that: a plurality of circular arc-shaped heat insulating members connected by the connecting member are formed of a plurality of cylindrical pipes with different diameters. The wall portion is provided on the outer peripheral portion of the cylindrical tube in a state of forming a plurality of layers.

That is, since the circular arc-shaped heat insulating member connected by the connecting member is formed of a plurality of cylindrical heat insulating wall parts with different diameters, they are provided in the outer peripheral part of the cylindrical pipe in a state of forming a plurality of layers. , so the cylindrical tube can be more properly insulated.

In short, according to the further characteristic configuration of the heat insulating structure for a cylindrical pipe of the present invention, it is possible to insulate the cylindrical pipe more suitably.

[First Embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. (The overall composition of the thermal insulation structure) As shown in Fig. 1 and Fig. 2, a cylindrical tube 1 for circulating low-temperature fluid such as LNG or LPG is arranged on the outer periphery of the cylindrical tube 1 so as to be arranged in the circumferential direction and the axis of the cylindrical tube 1 In the state of the orientation, a plurality of heat insulating members P made of a urethane foam system after foaming a urethane resin are installed.

The plurality of heat insulating members P have a constant thickness in the radial direction of the cylindrical tube 1 and extend in an arc shape (semicircular shape in this embodiment) along the circumferential direction of the cylindrical tube 1 . The elongated base material formed in the axial direction of the cylindrical tube 1 is long and cut in the axial direction of the cylindrical tube 1 to obtain a predetermined length. In addition, as shown in FIG. 5, in the following description, the surface on the radially outer side of the heat insulating member P is defined as the outer surface 3, the surface on the radially inner side is defined as the inner surface 4, and the radially inner surface is defined as the inner surface 4. The surfaces at both ends are referred to as end surfaces 5 , and the surfaces on both sides in the axial direction are referred to as side surfaces 6 .

In this embodiment, the heat insulating member P is installed so as to form a three-layer heat insulating wall. That is, as the insulating member P, there are provided a large-diameter insulating member PL of the largest diameter, an intermediate-diameter insulating member PM of an intermediate diameter, and a small-diameter insulating member PS of the smallest diameter (see FIG. 3 and FIG. 4 ). Furthermore, in the state where the heat insulating member P is laminated, the outer surface 3 of the large-diameter heat insulating member PL is located on the outermost side, and the inner surface 4 of the large-diameter heat insulating member PL and the outer surface 3 of the intermediate diameter heat insulating member PM are Arranged in the same diameter, the inner surface 4 of the middle diameter heat insulating member PM and the outer surface 3 of the small diameter heat insulating member PS are arranged in the same diameter shape, the inner surface 4 of the small diameter heat insulating member PS is the same as the outer periphery of the cylindrical pipe 1 The surfaces are arranged in a diametral shape.

Flanges F are provided at both ends of the cylindrical tube 1, and by connecting the flanges F of adjacent cylindrical tubes 1 with bolts, a flow path through which a low-temperature fluid flows is formed. The plurality of heat insulating members P are installed sequentially from one end of the cylindrical tube 1 toward the other end, and are installed at: adjacent to one end of the cylindrical tube 1 , and at the other end of the cylindrical tube 1 . The place where one end is adjoined, and the place corresponding therebetween.

The form of arranging the heat insulating members P in the axial direction of the cylindrical pipe 1 is the same as the form of arranging the small diameter heat insulating members PS of the smallest diameter and the form of arranging the large diameter heat insulating members PL of the largest diameter. The shape of the intermediate diameter heat insulating member PM is different. That is, the small-diameter heat insulating member PS, the intermediate-diameter heat insulating member PM, and the large-diameter heat insulating member PL are formed such that the length along the axial direction of the cylindrical pipe 1 becomes a basic length (for example, 1 m).

In addition, for the small-diameter heat insulating member PS and the large-diameter heat insulating member PL, the heat insulating member P having a substantial length is arranged from one end portion of the cylindrical pipe 1 toward the other end portion, while the intermediate diameter heat insulating member PM, Arrange the heat insulating member P of half the length of the basic length (for example, 0.5m) from one end of the cylindrical tube 1, and then arrange the heat insulating member P of the basic length toward the other end of the cylindrical pipe 1. arranged in a manner.

Adjacent to the other end of the cylindrical tube 1, the lengths in the axial direction of the small-diameter heat insulating member PS, the middle-diameter heat insulating member PM, and the large-diameter heat insulating member PL match the axial direction of the cylindrical pipe 1. The length is appropriately determined. However, in order to form a space for installing the connecting member 7 described later, the shafts of the small-diameter heat-insulating member PS, the intermediate-diameter heat-insulating member PM, and the large-diameter heat-insulating member PL installed adjacent to the other end of the cylindrical pipe 1 The length in the central direction is configured so as to be 1 m or more in length.

Also, for the intermediate diameter heat insulating member PM, in order to install the intermediate diameter heat insulating member PM of half the basic length (for example, 0.5 m) adjacent to one end of the cylindrical pipe 1, the distance between the cylindrical pipe 1 and the cylindrical pipe 1 is Where the other ends are adjacent, the axial lengths of the small-diameter heat insulating member PS and the large-diameter heat insulating member PL are different from the axial lengths of the intermediate diameter heat insulating member PM. In this embodiment, the axial length of the middle-diameter thermal insulation member PM is increased by half (for example, 0.5m) compared to the axial lengths of the small-diameter thermal insulation member PS and the large-diameter thermal insulation member PL. length.

Furthermore, in an intermediate place other than a place adjacent to one end of the cylindrical pipe 1 and a place adjacent to the other end of the cylindrical pipe 1, heat insulating members P are arranged and installed around the circumference of the cylindrical pipe 1. The structure of the direction (hereinafter referred to simply as the basic installation structure) is the same, but in the position adjacent to the other end of the cylindrical tube 1, the heat insulating members P are arranged and installed in the circumferential direction of the cylindrical tube 1. (Hereinbelow, simply referred to as the end installation structure), which is different from the basic installation structure. Next, the basic installation structure and the end installation structure will be described in order.

In addition, the place 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 (glass wool). The location of the unit has the same configuration 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 divided into a plurality of arc-shaped (semi-circular in this embodiment) in the circumferential direction of the cylindrical tube 1 is obtained by butting the end faces together. At each of the plurality of opposing positions in the circumferential direction of the cylindrical tube 1, a pair of adjoining members 7 (please refer to Figure 5) will be adjacent to each other along the axial direction of the cylindrical tube. The heat insulating member is provided on the outer peripheral portion of the cylindrical pipe 1 in a state where the ends thereof are connected. Furthermore, the length of the connecting member 7 is formed to be the same as the length of the heat insulating member P in the axial direction, and the connecting member 7 is made of urethane resin like the heat insulating member P.

As shown in Figures 3 and 5, in each of the ends of a pair of heat insulating members connected by the connecting member 7, the engaging groove U of the connecting member 7 is directed from the end surface toward the above-mentioned cylindrical tube. The recessed groove 8 that is recessed in the circumferential direction is formed on the radially outer side of the cylindrical pipe 1 of the recessed groove 8 with a locking groove 8a that is recessed toward the radially outer side of the cylindrical pipe 1. .

Furthermore, the connection member 7 is formed in its cross-sectional shape and includes: a main body connection portion 7A engaged with the recessed groove portion 8 of each end portion of a pair of heat insulating members, and a pair of locking grooves 8a engaged with each other The form of the connecting portion 7a.

Therefore, in the basic installation structure, on the outer peripheral portion of the cylindrical pipe 1, the semicircular heat insulating members P are arranged in the circumferential direction of the cylindrical pipe 1, and the connecting member 7 is arranged along the long side. direction (the axial direction of the cylindrical tube 1), and insert it in the form of engaging with the recessed groove 8 of each of the ends of the pair of heat insulating members, so that the heat insulating member P is attached to the cylindrical tube 1. Perimeter (refer to Figure 5).

In detail, first, the small-diameter heat insulating member PS is installed on the outer peripheral surface of the cylindrical pipe 1, secondly, the intermediate-diameter heat insulating member PM is installed on the outer peripheral surface of the small-diameter heat insulating member PS, and finally, the large-diameter heat insulating member PS is installed on the outer peripheral surface of the cylindrical pipe 1. PL is installed on the outer peripheral surface of the intermediate diameter heat insulating member PM. In this way, in the state where the small-diameter heat-insulating member PS, the middle-diameter heat-insulating member PM, and the large-diameter heat-insulating member PL are installed, a plurality of circular arcs (two semicircular shapes) connected by the connecting member 7 The heat insulating member P constitutes a plurality of (three) heat insulating wall portions formed in a cylindrical shape with different diameters, and is provided on the outer peripheral portion of the cylindrical pipe 1 in a state of forming a plurality of layers.

Also, it is constructed in such a way that the opposite position of the state where the end faces of the small-diameter heat insulating member PS are butted against each other and the position where the end faces of the medium-diameter heat insulating member PM are butted are opposite to each other. The phase difference in the circumferential direction of 1 is 90 degrees; similarly, the opposite position of the state after the end faces of the middle-diameter heat insulating member PM are butted against each other, and the opposite position of the state of the end faces of the large-diameter heat insulating member PL butt each other The small-diameter heat insulating member PS, the middle-diameter heat insulating member PM, and the large-diameter heat insulating member PL are installed in a form in which the phases in the circumferential direction of the cylindrical pipe 1 are 90 degrees different.

(End Mounting Structure) In the end installation structure, as shown in FIG. 4, the semicircular heat insulating member P divided into two parts in the circumferential direction of the above-mentioned cylindrical tube 1 can be divided into two parts in the circumferential direction of the cylindrical tube 1. Part of the semicircular heat insulating member PA is used. In addition, the heat insulating member P is in a state where the end faces are butted against each other, and at two positions facing each other in the circumferential direction of the cylindrical tube 1, the elongated connecting member B is arranged along the axis of the cylindrical tube. A pair of adjoining ones in the center direction are provided on the outer peripheral portion of the cylindrical pipe 1 in a state where the end portions of the heat insulating members are connected. Furthermore, the length of the connecting member B is formed to be the same length as the axial length of the heat insulating member P, and the connecting member B is made of urethane resin like the heat insulating member P.

In each of the pair of end portions of the heat insulating member at the above-mentioned two facing positions, the groove-shaped engaging portion V for engaging the connecting member B is recessed from the end surface 5 along the tangential direction of the cylindrical tube 1 . Each of the inner surface 10u and the outer surface 10g arranged along the radial direction of the cylindrical tube 1 is formed as a flat surface along the tangential direction of the cylindrical tube 1 . Also, the tangential direction of the cylindrical tube 1 in this description means the tangential direction of the cylindrical tube 1 in which the end faces 5 of the pair of heat insulating members P face each other when they are butted together.

Also, the recessed portion 10, as shown by a phantom line in FIG. 8b is formed by excision. That is to say, in this embodiment, the heat insulating member P is formed with the form of the recessed groove portion 8; in the basic installation form, the heat insulating member P is directly used; The lateral 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 recessed portion 10, and the heat insulating member P having such a recessed portion 10 is formed as a semicircular heat insulating member PA. to use.

In addition, the connection member B at the two facing positions is formed as a rectangular cuboid 11 by forming a cross-sectional shape into a square shape having a flat surface along the edge of a pair of heat insulating members. The inner surface 10u and the outer surface 10g of each concave portion 10 . Furthermore, since the corners of the square-shaped concave portion 10 are formed in an arc shape, the cross-sectional shape of the elongated cuboid 11 is specifically a square shape with rounded corners.

Also, in this embodiment, the rectangular cuboid 11 whose cross-sectional shape is formed into a square is formed of an elastically deformable material (urethane resin). As shown in FIG. 7, each of a pair of engaging parts 11A to which adjacent recessed parts 10 engage is formed with a slit 12 separating the engaging parts 11A in the radial direction of the cylindrical tube. In addition, the thickness of the elongated cuboid 11 is about 15 mm, and the slit 12 is formed to have a width of about 2 mm.

Therefore, in the end attachment structure, the heat insulating member P is attached to the outer peripheral portion of the cylindrical pipe 1 in the following procedure. First, the rectangular cuboid 11 is engaged with the recessed portion 10 formed at both ends of the heat insulating member P on one side of a pair of semicircular heat insulating members P (semicircular heat insulating member PA) divided into two. of each. Furthermore, when the elongated cuboid 11 is engaged in the recessed portion 10, the elongated cuboid 11 is engaged (inserted) in the indented portion 10 while moving in the longitudinal direction, or the elongated cuboid is 11 is engaged with the recessed portion 10 while moving in the recessed direction of the recessed portion 10 .

Then, the heat insulating member P (semicircular heat insulating member PA) engaged with one side of the elongated rectangular body 11 is mounted in a state of being pressed against the outer peripheral portion of the cylindrical tube 1 . Next, move the heat insulating member P on the other side so as to approach the cylindrical pipe 1, and in the state where the end faces 5 of the pair of heat insulating members P are in contact with each other, make the two ends of the heat insulating member P on the other side The recessed part 10 formed by the part moves the elongated cuboid 11 engaged with the two ends of the heat insulating member P on one side toward the tangential direction of the cylindrical tube 1 located in the opposite position, and performs Snap.

In detail, first, the small-diameter heat insulating member PS is installed on the outer peripheral surface of the cylindrical pipe 1, secondly, the intermediate-diameter heat insulating member PM is installed on the outer peripheral surface of the small-diameter heat insulating member PS, and finally, the large-diameter heat insulating member PS is installed on the outer peripheral surface of the cylindrical pipe 1. PL is installed on the outer peripheral surface of the intermediate diameter heat insulating member PM. In this way, in the state where the small-diameter heat insulating member PS, the middle-diameter heat insulating member PM, and the large-diameter heat insulating member PL are installed, the semicircular heat insulating member P (semicircular heat insulating member PA) divided into two parts is constituted. A plurality of (three) heat insulating walls formed in a cylindrical shape and having different diameters are provided in a plurality of layers on the outer peripheral portion of the cylindrical tube 1 .

In addition, the structure is the same as the basic installation structure, so that the opposite position of the state where the end faces of the small-diameter heat insulating member PS are butted together can be opposite to the state where the end faces of the medium-diameter heat insulating member PM are butted together. , the phase difference in the circumferential direction of the cylindrical pipe 1 is 90 degrees; similarly, the opposite position of the state where the end faces of the middle-diameter heat insulating member PM are butted against each other is opposite to that of the large-diameter heat insulating member PL. On the opposite side of the latter state, the small-diameter heat insulating member PS, the middle-diameter heat insulating member PM, and the large-diameter heat insulating member PL are installed in a form in which the phases of the cylindrical pipe 1 in the circumferential direction are different by 90 degrees.

(About thermal insulation reinforcement structure) In this embodiment, a thermal insulation reinforcing structure is provided to reinforce the thermal insulation between a plurality of thermal insulating members P installed on the outer peripheral surface of the cylindrical pipe 1 , that is, between adjacent thermal insulating members P. That is, the plurality of heat insulating members P installed on the outer peripheral surface of the cylindrical pipe 1 are cooled and shrunk by the low-temperature fluid circulating inside the cylindrical pipe 1 , and as a result, heat insulating members P are formed between adjacent heat insulating members P. Since there is a fear of reducing the thermal insulation performance in the gap, a thermal insulation reinforcement structure is provided to reinforce the thermal insulation performance.

The thermal insulation reinforcement structure has an inner reinforcement structure for the insulation wall formed on the small-diameter insulation member PS and an intermediate-diameter insulation member PM, and an outer reinforcement structure for the insulation wall formed on the large-diameter insulation member PL. The wall is provided, and the inner reinforcement structure and the outer reinforcement structure will be described in order below. In addition, in Fig. 1 to Fig. 6, the description of the adiabatic reinforcement structure is omitted.

(inside reinforcement structure) The inner reinforcement structure, as shown in FIG. 8, is configured by sticking an airtight seal to the portion where the end faces 5 of the pair of heat insulating members P arranged in the circumferential direction of the cylindrical tube 1 are located in the butted state. Adhesive tape (moisture-proof butyl tape) 13, and the adjacent heat insulating member P in the part 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, The connection body W provided with a pair of locking part Wa is installed.

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

In the present embodiment, as shown in FIG. 9, the connecting body W is configured in such a way that locking portions Wa are provided on both ends in the width direction of the bendable belt-shaped member 14, and the connecting body W, It is installed on the outer surface part of a pair of heat insulating members P in a wound state. That is, the belt-shaped member 14 is formed, for example, of tarpaulin, which is a vinyl-based material, in which a soft synthetic resin film is sandwiched with a polyester fiber woven fabric, and the belt-shaped member 14 is attached with a There is a sharp locking portion Wa made of synthetic resin.

Therefore, since the belt-shaped member 14 has no adhesiveness, after the belt-shaped member 14 is wound around the outer surfaces of the pair of heat insulating members P, an adhesive small-width tape is wound around the wound belt-shaped member 14 . 15, and it is configured so that the strip-shaped member 14 can be suppressed from coming off.

(outer reinforcement structure) The outer reinforcement structure, as shown in FIG. 8, is composed of a pair of large-diameter heat insulating members PL that are adjacently arranged in the axial direction of the cylindrical tube 1, and an adhesive tape is attached to it. The first leakage prevention body 16 is arranged in a plurality of (2) large-diameter heat insulating members PL in a state where the end faces 5 of the cylindrical tube 1 are butted in the circumferential direction. In each of the facing positions, an adhesive tape-shaped second leakage preventing member 17 is attached in a state of straddling a pair of large-diameter heat insulating members PL arranged adjacent to each other in the circumferential direction of the cylindrical tube 1 .

In addition, as is clear from the above description, the heat insulating wall formed by the large-diameter heat insulating member PL becomes the heat insulating wall corresponding to the outermost side in the radial direction of the cylindrical tube 1 among the plural (three) heat insulating walls. wall.

Furthermore, in the present embodiment, the third leakage prevention body 18 having an adhesive square shape is attached to the entire outer peripheral surface of the large-diameter heat insulating member PL to improve the heat insulating performance. Also, the first anti-leakage body 16, the second anti-leakage body 17, and the third anti-leakage body 18 are constructed by, for example, using a support body coated with aluminum foil and glass wool. Tape with rubber-based adhesive with excellent adhesion (ALGC tape).

Furthermore, as the first anti-leakage body 16, the second anti-leakage body 17, and the 3rd anti-leakage body 18, the order of sticking is first to stick the 3rd anti-leakage body 18, and then It is preferable to attach the second leakage prevention body 17 and finally the first leakage prevention body 16 in order.

[Second Embodiment] Next, the second embodiment will be described, but in this second embodiment, since the form of the slit 12 formed in the elongated cuboid 11 is different from that of the first embodiment, and other configurations are the same as those of the first embodiment, Therefore, only the parts different from those of the first embodiment will be described, and the description of the same configuration as that of the first embodiment will be omitted.

As shown in Figures 10 and 11, in this second embodiment, only the engaging portion 11A on one side of a pair of engaging portions 11A in the elongated cuboid 11 is formed with the card The combined part faces the radially separated slit 12 of the cylindrical tube 1. That is, in the first embodiment, although the slits 12 are formed in each of the pair of engaging parts 11A in the rectangular body 11, in the second embodiment, only one pair of engaging parts 11A is formed. The engaging part 11A on one side of the part 11A is different from the first embodiment in that the slit 12 is formed.

In this second embodiment, first, the rectangular cuboid 11 is engaged with both sides of the heat insulating member P on one side of a pair of semicircular heat insulating members P (semicircular heat insulating member PA) divided into two parts. When each of the recessed parts 10 formed at the end part is engaged with the engaging part 11A in which the slit 12 is not formed. Furthermore, when the elongated cuboid 11 is engaged in the recessed portion 10, the elongated cuboid 11 is engaged (inserted) in the indented portion 10 while moving in the longitudinal direction, or the elongated cuboid is 11 is engaged with the recessed portion 10 while moving in the recessed direction of the recessed portion 10 .

Then, the heat insulating member P engaged with one side of the elongated cuboid 11 is mounted in a state of being pressed against the outer peripheral portion of the cylindrical tube 1 . Next, the other heat insulating member P is moved so as to approach the cylindrical pipe 1, and in the state where the end faces 5 of the pair of heat insulating members P are butted, the two ends of the heat insulating member P on the other side are brought into contact with each other. The formed recessed portion 10 faces the circle located in the opposite position to the engaging portion 11A formed with the slit 12 in the elongated cuboid 11 which has been engaged with the both ends of the heat insulating member P on one side. The bobbin 1 is moved in the tangential direction while being engaged.

[third embodiment] Next, the third embodiment will be described, but in this third embodiment, since the structure of the connection member B in the end installation structure is different from that of the first embodiment, and other structures are the same as those of the first embodiment, so Only the parts different from the first embodiment will be described, and the description of the same configuration as the first embodiment will be omitted.

Compared with the above-mentioned first embodiment, the outer diameter of the cylindrical tube 1 is about 30mm, since in this third embodiment, the outer diameter of the cylindrical tube 1 is a large diameter of about 300mm, so 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, as in the first embodiment, the heat insulating member P is connected by the connecting member 7 to form a plurality of layers ( 3 layers) Installed in the form of a wall for heat insulation.

In addition, in the end installation structure, as shown in Fig. 13 and Fig. 14, the semicircular heat insulating member PA divided into two parts in the circumferential direction of the cylindrical tube 1 is based on the basic installation structure. The connecting member 7 used is configured by connecting two heat insulating members P formed in a 90-degree arc shape.

That is, the semicircular heat insulating member PA divided into two parts in the circumferential direction of the cylindrical tube is located in each of the two opposite positions in the circumferential direction of the cylindrical tube 1 in a state where the end faces are brought into contact with each other. The elongated connecting member B along the axial direction of the cylindrical pipe 1 is provided in a state of connecting the ends of a pair of adjacent heat insulating members.

In each of a pair of end portions of the heat insulating member at one side of the above-mentioned two facing positions, the groove-shaped engaging portion V for engaging the connecting member B is formed so that A square-shaped cut-out portion 20 obtained by cutting the radially inner part of the cylindrical tube 1 at the end of the heat-insulating member is formed on the radially outer side of the cylindrical tube 1 of the cut-out portion 20. A form of the locking recess 20 a that is recessed toward the radially outer side of the cylindrical tube 1 .

Also, in each of the pair of end portions of the heat insulating member at the other side of the above-mentioned two facing positions, the groove-shaped engaging portion V for engaging the connecting member B is the same as that of the above-mentioned first embodiment. Specifically, the recessed portion 10 is recessed from the end surface 5 along the tangential direction of the cylindrical tube 1 so that each of the inner side surface 10u and the outer side surface 10g arranged along the radial direction of the cylindrical tube 1 is arranged along a circle. The form of the flat surface in the tangential direction of the bobbin 1 is formed. Also, the tangential direction of the cylindrical tube 1 in this description means the tangential direction of the cylindrical tube 1 where the end faces 5 of the pair of heat insulating members P are facing each other when they are butted together.

The cut-out portion 20 of square shape, as shown by the imaginary line in the thirteenth figure, is by placing the lower side of the recessed groove portion 8 (inward in the radial direction of the cylindrical tube 1) in the basic installation structure. The lower part 8c at the position of the square side) is cut away, and is formed in such a manner that the locking groove 8a is used as the locking recess 20a. Also, the recessed portion 10, as shown by phantom lines in the thirteenth figure, is the same as the above-mentioned first embodiment, and is formed by placing the locking groove portion 8a in the recessed groove portion 8 in the basic installation structure. The lateral portion 8b at the lateral position of the slit is cut away and formed.

That is, in the present embodiment, the heat insulating member P is formed in the form provided with the recessed groove portion 8, and in the basic installation form, the heat insulating member P is used as it is. In addition, in the end installation structure, the position of the end of the heat insulating member P on one side of the pair of heat insulating members P connected by the connecting member 7 is on the lower side of the lower side of the recessed groove portion 8 . The portion 8c is cut away to form the cutout portion 20, and the lateral side portion 8b at the lateral side of the locking groove portion 8a of the recessed groove portion 8 at the end position of the heat insulating member P on the other side is cut away. In the square-shaped recessed portion 10, a pair of heat insulating members P formed by the cutout portion 20 and the recessed portion 10 are used as a semicircular heat insulating member PA.

In addition, the connection member B at one side of the two facing positions has a cross-sectional shape as shown in FIG. The square-shaped main body portion 21A for engagement and the pair of locking protrusions 21a engageable with the locking concave portion 20a make the cross-sectional shape of the elongated M-shaped member 21 M-shaped.

Also, the connection member B at the other side of the two opposing locations is the same as the first embodiment, and the cross-sectional shape is formed into a square shape with a flat surface to form a rectangular cuboid 11. , the flat surface is along the inner surface 10u and the outer surface 10g of each concave portion 10 at the ends of a pair of heat insulating members.

In this third embodiment, in the state where the end faces of the semicircular heat insulating member PA in a divided state are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1, In order to bring the end portions of a pair of adjacent heat insulating members into a connected state by the connecting member B, it is performed by the following procedure. First, the elongated M-shaped member 21 and the elongated cuboid 11 are engaged with each other at both ends of the semicircular heat insulating member PA on one side of the pair of semicircular heat insulating members PA in the divided state. Each of Part V. That is, the elongated M-shaped member 21 is engaged with the engaging portion V formed in the square-shaped cutout portion 20 provided with the locking concave portion 20a, and the elongated cuboid 11 is engaged with: The engagement portion V formed by the concave portion 10 whose end surface is concave toward the tangential direction of the cylindrical tube.

Then, the semicircular heat insulating member PA engaged with one side of the elongated M-shaped member 21 and the elongated cuboid 11 is installed in a state of being pressed against the outer peripheral portion of the cylindrical tube 1 . Next, first, with respect to the elongated M-shaped member 21, the engagement portion V formed on the one end side of the semicircular heat insulating member PA on the other side, that is, the cutout portion provided with the recessed portion 20a for locking is provided. The engaging portion V formed at 20 engages while moving in a direction approaching the cylindrical tube 1 from a point corresponding to the outside of the cylindrical tube 1 .

Next, with respect to the elongated cuboid 11, the engagement portion V formed on the other end side of the semicircular heat insulating member PA on the other side, that is, is recessed in the tangential direction from the end surface 5 toward the cylindrical tube 1. The engaging portion V formed by the recessed portion 10 of the pair of semicircular heat insulating members PA is engaged while moving toward the tangential direction of the cylindrical tube 1 located in the opposing position in a state where the end faces of the pair of semicircular heat insulating members PA are abutted.

In such a procedure, in the state where the end faces of the semicircular heat insulating member PA in the divided state are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1, the connecting member B is used. By connecting the ends of a pair of adjacent heat insulating members, even if there is no space corresponding to the length of the connecting member B at one side of the cylindrical pipe 1 in the semicircular heat insulating member PA in the axial direction, it can be installed. Set up connecting components.

Furthermore, in the basic installation structure, when the connection member 7 is detached and the heat insulating member P is disassembled for the inspection of the cylindrical pipe 1, etc., there is a fear that the forming part of the recessed groove 8 of the heat insulating member P may be damaged. In such a case, the lower part 8c located on the lower side of the recessed groove 8 may also be cut to form the cutout 20, and the connecting member 7 may be replaced by a long M-shaped member 21 connected to the insulating member P.

[Fourth Embodiment] Next, the fourth embodiment will be described, but in this fourth embodiment, since the structure of the connecting member B in the end installation structure is different from that of the third embodiment, and other structures are the same as those of the third embodiment, so Only the parts different from the third embodiment will be described, and the description of the same configuration as the third embodiment will be omitted.

That is, the semicircular heat insulating member PA divided into two parts in the circumferential direction of the cylindrical pipe 1 is formed by connecting two heat insulating members PA in a 90-degree arc shape through the connecting member 7 used in the basic installation structure. Members P are connected and constituted. That is, the semicircular heat insulating member PA divided into two parts in the circumferential direction of the cylindrical tube is each located at two opposing positions in the circumferential direction of the cylindrical tube 1 in a state where the end faces are butted against each other. The elongated connecting member B is provided in a state of connecting a pair of adjacent heat insulating members P along the axial direction of the cylindrical pipe 1 .

In each of the end portions of the heat insulating member at one of the above-mentioned two opposing positions, the groove-shaped engaging portion V for engaging the connecting member B is formed such that it is positioned at the end portion of the heat insulating member along the circumferential direction of the cylindrical tube 1 . The radially inner part of the cylindrical tube 1 is cut away to form a square-shaped cutout portion 20. On the radially outer side portion of the cylindrical tube 1 of the cutout portion 20, there is formed: 20 is a form of the locking recess 20a in which the radially outer side of the cylindrical tube 1 is recessed.

That is, in the present embodiment, the heat insulating member P is formed in the form provided with the recessed groove portion 8, and in the basic installation form, the heat insulating member P is used as it is. In addition, in the end installation structure, the lower part 8c located at the lower side of the recessed groove part 8 at the two ends of a pair of heat insulating members P connected by the connecting member 7 is cut away to form a cutout. The portion 20 is thus used as a semicircular heat insulating member PA by using the pair of heat insulating members P formed by the cutout portion 20 (see FIG. 13 ).

In addition, the connecting member B at the two facing positions is formed in a cross-sectional shape so as to include a square-shaped main body portion 21A capable of engaging with each square-shaped cut-out portion 20 at the ends of a pair of heat insulating members, and a square-shaped main body portion 21A capable of engaging with each other. The form of the pair of locking protrusions 21a engaged with the locking recesses 20a is such that the cross-sectional shape is an M-shaped elongated M-shaped member 21 (see FIG. 15).

In this fourth embodiment, in a state where the end faces of the semicircular heat insulating member PA in a divided state are butted against each other, for each of the two opposing positions located in the circumferential direction of the cylindrical tube 1, In order to connect the end portions of a pair of adjacent heat insulating members with the connecting member B, it is performed by the following procedure. First, the elongated M-shaped member 21 is engaged with each of the engaging portions V formed at both ends of the semicircular heat insulating member PA on one side of the pair of semicircular heat insulating members PA divided into two. . That is, the elongated M-shaped member 21 is engaged with the engaging portion V formed in the square cutout portion 20 having the locking recess 20a.

Then, the semicircular heat insulating member PA engaged with one side of the elongated M-shaped member 21 is mounted in a state of being pressed against the outer peripheral portion of the cylindrical tube 1 . Next, first, with respect to one of the elongated M-shaped members 21, the engaging portion V formed on one end side of the semicircular heat insulating member PA on the other side, that is, is made into a square shape having a locking concave portion 20a. The engaging portion V formed by the cutout portion 20 of the cylindrical pipe 1 engages while moving in a direction approaching the cylindrical pipe 1 from a position corresponding to the outside of the cylindrical pipe 1 .

Next, with respect to the elongated M-shaped member 21 on the other side, the engagement portion V formed on the other end side of the semicircular heat insulating member PA on the other side, that is, the side provided with the recessed portion 20a for locking The engaging portion V formed by the cutout portion 20 of the shape engages while moving in a direction approaching the cylindrical tube 1 from a point corresponding to the outside of the cylindrical tube 1 .

Furthermore, when moving the engagement portion V formed on the other end side of the semicircular heat insulating member PA on the other side in a direction approaching the cylindrical tube 1 from a position corresponding to the outside of the cylindrical tube 1, the other 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 pipe 1 .

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

[Other Embodiments] Hereinafter, other embodiments are listed. (1) In the above-mentioned embodiment, although the heat insulating member P was illustrated as a semicircle divided into two parts along the circumferential direction of the cylindrical tube 1, or divided into four parts, it is not limited thereto. In the basic installation structure, the heat insulating member P may be divided into three parts along the circumferential direction of the cylindrical tube 1, or divided into five or more parts; and in the end part installation structure, the heat insulating member P may also be divided , is divided into an even number of six or more parts along the circumferential direction of the cylindrical pipe 1 , and these are connected to form a semicircular semicircular heat insulating member PA.

(2) In the above-mentioned embodiment, although the case where the heat insulating member P is installed on the outer peripheral portion of the cylindrical tube 1 by means of the basic installation structure and the end installation structure is illustrated, it is also possible to install the heat insulating member P by the end installation structure. It implements the structure and the form which installed the heat insulating member P in the whole length of the cylindrical pipe 1.

(3) In the above-mentioned embodiment, although the connecting member B and the connecting member 7 are formed of the same material as the heat insulating member P, they are not limited to this, and the connecting member B and the connecting member may be formed of different materials. 7 and the insulation member P.

(4) In the above embodiment, although urethane resin was used as the material of the heat insulating member P, 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-mentioned embodiment, the outer peripheral portion of the cylindrical pipe 1 is exemplified in the case of forming a heat insulating wall of three layers as a plurality of layers of heat insulating wall, but it may also be formed in the form of forming a heat insulating wall of two layers. To implement, and more than 4 layers of heat-insulating walls can also be formed.

(6) In the above embodiment, the case where the slit 12 is formed in the elongated cuboid 11 as the connection member B is exemplified, but it may be implemented in a form in which the formation of the slit 12 is omitted.

(7) In the above-mentioned embodiment, although it is exemplified that the cross-sectional shape of the elongated cuboid 11 constitutes the connecting member B, and the connecting member B has the concave portion 10 with the inner surface 10u and the outer surface 10g. In the case of a flat surface that engages, but as a connecting member B with a flat surface, its cross-sectional shape can also be formed as a convex elongated body that is gradually tapered at both ends. The cross-sectional shape of the connection member B having a flat surface can be changed in various ways.

Also, the configurations disclosed in the above-mentioned embodiments (including other embodiments, the same below) can be used in combination with the configurations disclosed in other embodiments as long as there is no contradiction. Moreover, the configurations disclosed in this patent specification The above-mentioned embodiment is only an illustration, and the embodiment of the present invention is not limited thereto, and can be appropriately changed within a range not departing from the purpose of the present invention.

1‧‧‧cylindrical tube 5‧‧‧end face 7‧‧‧connecting components 7a‧‧‧Catching connection part 8‧‧‧Concave groove 8a‧‧‧Ditch for locking 10‧‧‧Recessed part 12‧‧‧slit 20‧‧‧Resection 20a‧‧‧Depression for locking 21A‧‧‧Body Department 21a‧‧‧locking convex part B‧‧‧connecting components D‧‧‧Insulation material F‧‧‧flange P‧‧‧thermal insulation components PA‧‧‧semi-circular heat insulation component PL‧‧‧Large Diameter Insulation Components PM‧‧‧Medium Diameter Insulation Component PS‧‧‧Small Diameter Insulation Components Q‧‧‧Insulation member for flange U‧‧‧Catch groove V‧‧‧Joint Department

Fig. 1 is a longitudinal sectional side view showing the installed state of the heat insulating member. Fig. 2 is a cutaway perspective view showing the installed state of the heat insulating member and the semicircular heat insulating member. Figure 3 is a view viewed from the arrow direction of line III-III in Figure 1. Figure 4 is a view viewed from the arrow direction of line IV-IV in Figure 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 view showing the relationship between the connection member and the semicircular heat insulating member. Figure 7, a perspective view of the connecting member. Fig. 8 is a perspective view showing the installation form of the connecting body. Fig. 9 is an enlarged perspective view of the connected body. Fig. 10 is a front view showing the installation form of the semicircular heat insulating material according to the second embodiment. Fig. 11 is a perspective view showing a connection member of the second embodiment. Fig. 12 is a front view showing the installation form of the heat insulating member according to the third embodiment. Fig. 13 is a front view showing the relationship between the semicircular heat insulating member and the connection member according to the third embodiment. Fig. 14 is a front view showing the installation form of the semicircular heat insulating member according to the third embodiment. Fig. 15 is a perspective view showing a connecting member according to a third embodiment. Fig. 16 is a front view showing the installation form of the semicircular heat insulating member according to the fourth embodiment. Fig. 17 is a front view showing an installation form of a heat insulating member of a comparative example. Fig. 18 is an exploded perspective view showing an installation form of a heat insulating member of a comparative example.

1‧‧‧cylindrical tube

D‧‧‧Insulation material

F‧‧‧flange

P‧‧‧thermal insulation components

PA‧‧‧semi-circular heat insulation component

PL‧‧‧Large Diameter Insulation Components

PM‧‧‧Medium Diameter Insulation Component

PS‧‧‧Small Diameter Insulation Components

Q‧‧‧Insulation member for flange

Claims (9)

A heat insulating structure for a cylindrical pipe, in which a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe is placed on the outer peripheral portion of the cylindrical pipe through which a low-temperature fluid flows, with the end faces butted against each other. In each of the two facing positions in the circumferential direction of the cylindrical tube, a long connecting member is installed in a state where the end portions of an adjacent pair of heat insulating members are connected along the axial direction of the cylindrical tube. The heat insulating structure for a cylindrical pipe of the present invention is characterized in that, in each of the end portions of the heat insulating member at one of the two opposing positions, as a groove-shaped engaging portion for engaging the connecting member, In the radial direction of the above-mentioned cylindrical tube, the cut-out portion obtained by cutting away the inner part of the radial direction of the above-mentioned cylindrical tube at the end of the above-mentioned heat insulating member along the circumferential direction of the above-mentioned cylindrical tube. The outer side part is formed to have a form of a locking recess that is recessed toward the radially outer side of the above-mentioned cylindrical tube; the above-mentioned connecting member at one side of the above-mentioned two facing positions has a cross-sectional shape formed as It is provided with: a main body portion engaged with each of the cutout portions of the pair of end portions of the heat insulating member, and a pair of locking convex portions engaged with the locking concave portion; the other of the two facing positions In each of the pair of end portions of the heat insulating member at one side, the groove-shaped engaging portion for engaging the connecting member is a recessed portion that is recessed from the end surface along a tangential direction of the cylindrical tube, Each of the inner and outer surfaces arranged in the radial direction of the cylindrical tube is formed as a flat surface along the tangential direction of the cylindrical tube. State formed; the above-mentioned connecting member at the other side of the above-mentioned two facing places is formed to have a cross-sectional shape having a flat surface, and the flat surface is along a pair of ends of the above-mentioned heat insulating member. The inner surface and the outer surface of each of the recessed portions. A heat insulating structure for a cylindrical pipe, in which a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe is placed on the outer peripheral portion of the cylindrical pipe through which a low-temperature fluid flows, with the end faces butted against each other. In each of the two facing positions in the circumferential direction of the cylindrical tube, a long connecting member is installed in a state where the end portions of an adjacent pair of heat insulating members are connected along the axial direction of the cylindrical tube. The heat insulating structure for a cylindrical pipe of the present invention is characterized in that in each of the ends of the pair of the heat insulating members at the two opposing positions, a groove-shaped engaging portion for engaging the connecting member is formed along the circle. In the circumferential direction of the bobbin, the cutout portion of the radially inner side of the cylindrical tube at the end of the above-mentioned heat insulating member is cut away, and at the radially outer side of the cylindrical tube at the cutout portion, It is formed to have a locking recess that is recessed toward the radially outer side of the cylindrical tube; the above-mentioned connecting member in the above-mentioned two opposing positions is formed in a cross-sectional shape that has: a pair of end portions of the above-mentioned heat insulating member A form in which each of the above-mentioned cut-out parts engages with the main body part, and a pair of locking convex parts engage with the above-mentioned locking concave part. A heat insulating structure for a cylindrical pipe, in which a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe is placed on the outer peripheral portion of the cylindrical pipe through which a low-temperature fluid flows, with the end faces butted against each other. In each of the two facing positions in the circumferential direction of the cylindrical tube, a long connecting member is installed in a state where the end portions of an adjacent pair of heat insulating members are connected along the axial direction of the cylindrical tube. The heat insulating structure for a cylindrical pipe is characterized in that, in each of the ends of the pair of the heat insulating members at the two opposing positions, as a groove-shaped engaging portion for engaging the connecting member, a The concave part that is recessed along the tangential direction of the above-mentioned cylindrical tube is arranged so that each of the inner side surface and the outer side surface along the radial direction of the above-mentioned cylindrical tube is set as a flat surface along the tangential direction of the above-mentioned cylindrical tube. form; the above-mentioned connection member in the above-mentioned two opposing positions is formed to have a cross-sectional shape having a flat surface, and the flat surface is along each of the above-mentioned concave parts of the end portions of the pair of above-mentioned heat insulating members. The above-mentioned inner surface and outer surface; the above-mentioned connection member forming a shape having a flat surface is formed of an elastically deformable material, and one of a pair of engaging parts for engaging with the adjacent above-mentioned recessed part in the connection member The engaging portion on one side is formed with a slit separating the engaging portion toward the radial direction of the cylindrical tube. A heat insulating structure for a cylindrical pipe, in which a semicircular heat insulating member divided into two parts in the circumferential direction of the cylindrical pipe is placed on the outer peripheral portion of the cylindrical pipe through which a low-temperature fluid flows, with the end faces butted against each other. In each of the two opposite positions in the circumferential direction of the above-mentioned cylindrical tube, a long strip is used to connect A thermal insulation structure for a cylindrical pipe provided in a state in which a pair of adjacent ends of the heat insulating member are connected along the axial direction of the cylindrical pipe, wherein a pair of the above heat insulating members are located at the two opposing positions. In each of the member end portions, as the groove-shaped engaging portion for engaging the connecting member, it is a recessed portion that is recessed from the end surface along the tangential direction of the cylindrical tube so that the groove along the cylindrical tube Each of the radially arranged inner and outer surfaces is formed in the shape of a flat surface along the tangential direction of the cylindrical tube; It has a shape of a flat surface, and the flat surface is along the inner surface and the outer surface of each of the above-mentioned concave parts of the pair of ends of the heat insulating member; Each of a pair of engaging portions for engaging with the adjacent recessed portion in the connecting member is formed with a slit that separates the engaging portion toward the radial direction of the cylindrical tube. The thermal insulation structure for a cylindrical pipe according to claim 1, wherein the connecting member having a flat surface is formed of an elastically deformable material, and the connecting member is used to connect with the adjacent The engaging portion on one side of the pair of engaging portions engaged with the concave portion is formed with a slit that separates the engaging portion toward the radial direction of the cylindrical tube. The thermal insulation structure for a cylindrical pipe as described in item 1 of the scope of the patent application, which In this case, the above-mentioned connection member formed into a shape having a flat surface is formed of an elastically deformable material, and each of a pair of engaging portions for engaging with the adjacent above-mentioned concave portion in the connection member is formed with a The engaging portion faces the radially separated slit of the cylindrical tube. The thermal insulation structure for a cylindrical pipe according to any one of claims 1 to 6 of the patent claims, wherein a plurality of cylindrical shapes with different diameters are formed by the semicircular heat insulating member divided into two parts. The heat insulating wall is provided on the outer peripheral portion of the above-mentioned cylindrical tube in a state of forming a plurality of layers. The heat insulating structure for a cylindrical pipe according to any one of claims 1 to 6 of the patent claims, wherein the arrangement of the semicircular heat insulating member connected by the connecting member in the outer peripheral portion of the cylindrical pipe At the position adjacent to the axial center direction of the above-mentioned cylindrical tube, the heat insulating member divided into a plurality of circular arcs in the circumferential direction of the above-mentioned cylindrical tube is located on the above-mentioned cylindrical tube in a state where the end faces are butted against each other. In each of the plurality of facing positions in the circumferential direction, the elongated connecting member is used to connect the ends of the adjacent pair of heat insulating members along the axial direction of the cylindrical tube; In each of the ends of the pair of heat insulating members to which the connecting member is connected, the engagement groove of the connecting member is a recessed groove that is recessed from the end surface toward the circumferential direction of the cylindrical tube. ditch The radially outer side portion of the above-mentioned cylindrical tube is formed to have a groove for locking that is recessed toward the radially outer side of the above-mentioned cylindrical tube; A form in which the main body connection portion of each of the pair of end portions of the heat insulating member is recessed into the groove, and a pair of locking connection portions engaged with the locking groove. The thermal insulation structure for a cylindrical pipe as described in claim 8 of the patent application, wherein the plurality of thermal insulation structures in a cylindrical shape and having different diameters are formed by a plurality of arc-shaped thermal insulation members connected by the aforementioned connection member. The wall portion is provided on the outer peripheral portion of the cylindrical tube in a state of forming a plurality of layers.

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