JP2008138772A - Pipe thermal insulation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe thermal insulation device capable of quickly coating, by an easy operation, the outer peripheral surface of a bent pipe extending through a curved through hole formed in a wall, and capable of preventing heat from being conducted to the inner wall of the through hole. <P>SOLUTION: This pipe thermal insulation device 1 comprises ring cylindrical bodies 10 capable of coating the entire outer circumferential surface of the bent pipe 9 for thermal insulation and connectable to and disconnectable from each other in the pipe longitudinal direction. The ring cylindrical bodies are formed of thermal insulation panels 2 connectable to and disconnectable from each other in the pipe circumferential direction. A rotating body allowed to come into contact with the outer peripheral surface of the bent pipe 9 and rotatable in the longitudinal direction of the outer peripheral surface is installed on the inner surface of the thermal insulation panel 2. The ring cylindrical body 10 is slidable in the longitudinal direction of the bent pipe 9. The ring cylindrical bodies 10 are swingably connected to each other in the bending direction of the bent pipe 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a plurality of ring-shaped cylinders that can cover and insulate the outer peripheral surface of a bent pipe over the entire circumference and can be connected and separated from each other in the longitudinal direction of the pipe. The present invention relates to a pipe heat insulating device constituted by a plurality of heat insulating panels that can be connected and separated.

According to the above pipe heat insulating device, a plurality of heat insulating panels are first connected in the pipe circumferential direction to the outer circumferential surface of a pipe-shaped thermal insulation object (for example, a coolant pipe in a nuclear power plant), and the pipe outer circumferential surface. A ring-shaped cylinder that covers the entire circumference is formed, and a plurality of ring-shaped cylinders are provided in the longitudinal direction of the pipe by repeating the operation. Next, by connecting the plurality of ring-shaped cylinders to each other, the entire outer peripheral surface of the tubular heat-insulated object can be covered (heat-insulated), and the heat radiation can be reduced.
By the way, for example, in a nuclear power plant, a reactor coolant is circulated through a coolant pipe between a reactor vessel and a loop chamber equipped with a circulation pump, and nuclear fuel (core) in the reactor vessel is circulated. The reactor coolant is boiled by the heat generated to generate high-temperature and high-pressure steam, and the steam is sent to the generator turbine to generate electricity.
A concrete wall (thickness of about 1.2 m to 1.8 m) for shielding radiation is provided between the reactor vessel and the loop chamber. For this reason, a through hole is provided in the concrete wall. The coolant pipe is penetrated inside.
Since the gap provided between the coolant pipe and the inner wall of the through hole is very narrow and the wall thickness of the concrete wall is also thick, the coolant pipe provided in the through hole is Installation work is often difficult.
In particular, when the coolant pipe is a bent pipe provided in accordance with a curved through-hole, the installation work becomes more difficult. As shown, the coolant tube 9 is covered by manually pushing and filling a fiber insulation material 27 such as rock wool into the gap between the coolant tube 9 and the inner wall of the through-hole 13 to dissipate the heat. The current situation is that it is reduced.
Such a prior art is widely known among those skilled in the art, and since there is no patent document or the like that is mentioned in detail, a prior art document cannot be disclosed.

  As mentioned above, the coolant pipe (bent pipe) provided in the curved through hole has to be filled by manually pushing in the fiber heat insulating material. In addition, the heat from the coolant pipe can be transferred to the inner wall (concrete wall) of the through hole through the filled fibrous heat insulating material, and as a result, the strength of the concrete wall is reduced by the heat. There was a problem.

  The present invention has been made in view of the above circumstances, and in a curved pipe that penetrates a curved through hole provided in a wall, the outer peripheral surface of the pipe can be quickly covered with a simple operation, and The present invention provides a pipe heat insulating device capable of preventing heat conduction to the inner wall of the through hole.

  The first characteristic configuration of the present invention is provided with a plurality of ring-shaped cylinders that can cover and insulate the outer peripheral surface of the bent pipe over the entire circumference, and can be connected and separated from each other in the longitudinal direction of the pipe. A pipe heat insulating device comprising a plurality of heat insulating panels that can be connected and separated in the pipe circumferential direction, and a rotating body capable of contacting the outer peripheral surface of the bent pipe and rotatable in the longitudinal direction of the outer peripheral surface. Provided on the inner surface of the heat insulation panel, the ring-shaped cylinder is slidable in the longitudinal direction of the bent pipe, and the plurality of ring-shaped cylinders are connected to be able to swing in the bent direction of the bent pipe. It is that it is a pipe heat insulation device.

[Action and effect]
According to the present invention, in a bent pipe arranged in accordance with a curved through-hole, the size of the gap between the outer peripheral surface of the bent pipe and the inner wall of the through-hole is such that a human enters inside. Even if it is a very narrow one that is difficult to work, the outer peripheral surface of the bent pipe in the through-hole can be used as long as it has a size approximately equal to the thickness of the ring-shaped cylinder (heat insulating panel). It can be simply and quickly covered with a pipe heat insulating device.
That is, in the pipe heat insulating device of the present invention, the inner surface of the heat insulating panel is provided with a rotating body that can come into contact with the outer peripheral surface of the bent pipe and is rotatable in the longitudinal direction of the outer peripheral surface. The ring-shaped cylindrical body constituted by can be slid and moved in the longitudinal direction of the bent pipe.
Accordingly, first, on the outer peripheral surface of the pipe outside the through-hole, a plurality of heat insulating panels are connected in the pipe peripheral direction to form a ring-shaped cylinder that covers the outer peripheral surface of the pipe over the entire circumference. A plurality of ring-shaped cylinders are formed in the hand direction.
Next, while connecting the plurality of ring-shaped cylinders, the entire outer peripheral surface of the bent pipe in the curved through-hole is simply and easily moved with the ring-shaped cylinder by sliding it into the through hole. It can be coated quickly.
Furthermore, according to the present invention, it is possible to provide a gap between the pipe heat insulating device of the present invention and the inner wall of the through hole, and more effectively prevent heat conduction from the bent pipe to the inner wall of the through hole. Can do. Therefore, for example, when the bent pipe is a very high temperature pipe such as a coolant pipe of a nuclear power plant, it is difficult for heat from the coolant pipe to be transmitted to the inner wall of the through hole, and as a result, the strength of the wall is reduced due to heat. Can be prevented.
In the pipe heat insulating device of the present invention, the plurality of ring-shaped cylindrical bodies are connected so as to be swingable with respect to each other in the bending direction of the bent pipe, so that even when covering a bent pipe whose curvature is not constant, Since a plurality of ring-shaped cylinders can swing in accordance with the curvature of the bent pipe, when the ring-shaped cylinder is pushed into the through-hole, it can slide smoothly without being caught in the through-hole. Even bent piping with poor curvature accuracy can be reliably covered.

A second characteristic configuration of the present invention is that the plurality of ring-shaped cylinders are connected to each other through a hinge member so as to be swingable.
[Action and effect]
By interposing the hinge member, it is possible to connect the plurality of ring-shaped cylinders so as to be swingable easily and reliably.

According to a third characteristic configuration of the present invention, in the hinge member, the pair of hinge bodies can be connected to and separated from the pair of hinge bodies that can swing with respect to each other via the pivot shaft. The point is that it is freely configured.
[Action and effect]
Since the hinge member is configured so that the pivot shaft can be inserted and removed with respect to the pair of hinge bodies that can swing with respect to each other via the pivot shaft, the pair of hinge bodies can be connected and separated. By providing them in different ring-shaped cylinders, it is possible to freely connect and separate a plurality of ring-shaped cylinders by simply inserting and removing the pivot shaft.
Therefore, by using the hinge member, the connecting operation of the ring-shaped cylinders becomes very easy, and a plurality of ring-shaped cylinders can be connected more easily and quickly.

A fourth characteristic configuration of the present invention is that the plurality of ring-shaped cylinders are configured to be connected and separated from each other via a hook-and-loop fastener.
[Action and effect]
Since the hook-and-loop fastener is easy to detach and attach, the connecting operation of the ring-shaped cylinders becomes very simple, and a plurality of ring-shaped cylinders can be connected more easily and quickly.

A fifth characteristic configuration of the present invention is that the plurality of ring-shaped cylinders are connected by wires.
[Action and effect]
Since the wire can be obtained at a low price, the manufacturing cost of the present invention can be reduced.

The sixth characteristic configuration of the present invention is that a heat-insulating material that is stretchable is interposed between the plurality of ring-shaped cylinders to be connected.
[Action and effect]
Since a stretchable heat insulating material is interposed between the connected ring-shaped cylinders, there is no gap between the ring-shaped cylinders, and the outer peripheral surface of the bent pipe is covered more securely with less heat leakage. It can be (insulated).

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 shows a pipe heat insulating device 1 of the present invention (first embodiment). The pipe heat insulating device 1 of the present invention can cover the outer peripheral surface of the bent pipe 9 arranged in accordance with the curved through-hole 13 and can be connected and separated in the pipe circumferential direction, which will be described later. And 2B, a plurality of ring-shaped cylindrical bodies 10 that can cover the outer peripheral surface of the bent pipe 9 over the entire circumference and can be connected and separated from each other in the longitudinal direction of the pipe are provided in the longitudinal direction of the bent pipe 9, It can be formed by sequentially connecting the ring-shaped cylinders 10.

(Insulation panel)
2 and 3 show heat insulation panels 2A and 2B constituting the pipe heat insulation device 1 (first embodiment) of the present invention (FIG. 2 is a perspective view of the heat insulation panels 2A and 2B, and FIG. (It is a top view of the heat insulation panels 2A and 2B).
<Insulation panel 2A>
As shown in FIG. 2, the heat insulating panel 2 </ b> A includes a panel body 3 (a curved rectangular casing including a stainless steel short plate 3 a, a long plate 3 b, an inner plate 3 c, and an outer plate 3 d).
The panel body 3 of the heat insulating panel 2A is curved so as to be along the outer peripheral surface of the bent pipe to be insulated, and when the heat insulating panel 2A is disposed on the bent pipe, they are adjacent to each other in the longitudinal direction of the bent pipe. The lateral width H of the outer plate 3d (same for the inner plate 3c) becomes wider toward the short plate 3a so that the side surfaces of the heat insulating panel 2A (long plates 3b of the panel body 3) can be joined to each other. As shown, the shape is configured to be trapezoidal in plan view.
Further, the inner plate 3c (the inner surface of the heat insulation panel) of the heat insulation panel 2A is provided with contact portions 4 (four places) having a rotating body 4a (ball bearing), and the outer plate 3d is provided with the heat insulation panel 2A. When the buckle type connecting portion 5 (male member 5a and female member 5b) and the heat insulating panels 2A and 2B used for assembling and connecting 2B and 2B are arranged on the pipe outer peripheral surface, they are adjacent to each other in the pipe circumferential direction. An overlap member 6 that can cover the joint between the heat insulating panels 2A and 2B from the outside of the panel body 3 is provided.

<Insulation panel 2B>
As shown in FIG. 2, the heat insulating panel 2B has a panel body 3 (curved rectangular casing made of a stainless steel short plate 3a, a long plate 3b, an inner plate 3c, and an outer plate 3d, similar to the heat insulating panel 2A. ).
The panel body 3 of the heat insulating panel 2B is curved so as to be along the outer peripheral surface of the bent pipe to be insulated, and when the heat insulating panel 2B is disposed in the bent pipe, the panel main body 3 is adjacent to each other in the longitudinal direction of the bent pipe. The lateral width H of the outer plate 3d (the same applies to the inner plate 3c) becomes narrower toward the short plate 3a so that the side surfaces of the heat insulation panel 2B (long plates 3b of the panel body 3) can be joined together. As shown in FIG. 4, the shape is a trapezoid in a plan view.
Similar to the heat insulation panel 2A, the inner plate 3c (the inner surface of the heat insulation panel) of the heat insulation panel 2B is also provided with contact portions 4 (four places) having a rotating body 4a (ball bearing), and the outer plate 3d. In addition, when the buckle type connecting portion 5 (male member 5a and female member 5b) and the heat insulating panels 2A and 2B used for assembling and connecting the heat insulating panels 2A and 2B are disposed on the outer peripheral surface of the pipe, An overlap member 6 capable of covering the joint between the heat insulating panels 2A and 2B adjacent to each other in the circumferential direction from the outside of the panel body 3 is provided.
A pull style hinge 7 is provided as a hinge member 7 on the two long plates 3b of the heat insulating panel 2B. Hinge bodies 7a and 7b of the pull-style hinge 7 are fixed to the two long plates 3b by bolts 8, respectively.

(Ring-shaped cylinder)
FIG. 4 is a cross-sectional view of the ring-shaped cylindrical body 10 formed by arranging the heat insulating panels 2A and 2B on the bent pipe 9 when viewed from the axial direction of the bent pipe 9.
The abutting portion 4 of the heat insulating panels 2A and 2B is attached to a ball bearing 4a with a spring member 11 (biasing means) produced by bending an appropriate metal plate in a step shape, and one end of the spring member 11 is used as an inner plate. It is fixed by spot welding to the provided box-shaped installation space 12. At this time, the ball bearing 4 a is supported so as to slightly protrude from the installation space 12 so as to be movable in the perspective direction with respect to the outer peripheral surface of the bent pipe 9.
Even when there is some design error when the heat insulating panels 2A and 2B are disposed on the outer peripheral surface of the bent pipe 9, the bent pipe 9 is in contact with the ball bearing 4a of the contact portion 4 by the action of the spring member 11. Since it is biased toward the outer peripheral surface, the bent pipe 9 can always be in contact with the outer peripheral surface.
That is, the ball bearing 4 a can rotate in any direction, not limited to the longitudinal direction of the bent pipe 9, while always contacting the outer peripheral surface of the bent pipe 9. Therefore, by forming the ring-shaped cylinder 10 using the heat insulating panels 2A and 2B including the ball bearing 4a, the ring-shaped cylinder 10 can be slid in the longitudinal direction of the bent pipe 9.
As shown in FIG. 4, an appropriate heat insulating material 15 and a reflecting plate 16 that reflects heat can be accommodated inside the panel body 3, and in some cases to shield radiation. It is also possible to accommodate a lead plate (not shown). Examples of the heat insulating material 15 include glass wool, rock wool, silica powder, calcium silicate, and the like. However, the heat insulating material 15 is not limited to these, and the various heat insulating materials 15 may be arbitrarily selected as necessary. It can also be used in combination.

FIG. 5 shows a state in which two ring-shaped cylinders 10 formed on the bent pipe 9 are connected to each other so as to be swingable in the bent direction of the bent pipe 9.
The two ring-shaped cylinders 10 adjacent to each other in the longitudinal direction of the bent pipe 9 are the hinge body 7a provided on the heat insulating panel 2B of one ring-shaped cylinder 10 and the other ring-shaped cylinder 10 adjacent to each other. By connecting with the hinge body 7b provided in the heat insulation panel 2B, the bent pipe 9 is connected to be able to swing in the bending direction.
In addition, the ring-shaped cylinder 10 in this embodiment is connected via a pull style hinge (hinge member 7), as FIG.6 and FIG.7 shows.
The pull-style hinge is configured such that a pair of hinge bodies 7a and 7b can swing and be connected to and separated from each other via a pivot shaft 7c that can be freely drawn and pointed. That is, as shown in FIG. 6, when the hinge bodies 7a and 7b are separated, the two pivot shafts 7c of the hinge body 7a are pulled out, and the tip of the pivot shaft 7c is supported by the bearing of the hinge body 7b. By removing from the hole 7d, the pair of hinge bodies 7a and 7b can be separated. Further, as shown in FIG. 7, when the hinge bodies 7a and 7b are connected, the convex portion 18 of one hinge body 7b is fitted into the concave portion 17 of the hinge body 7a, and the two pivot shafts of the hinge body 7a are fitted. The pair of hinge bodies 7a and 7b can be connected so as to be swingable by pushing 7c inwardly and inserting the tip portion into the bearing hole 7d of the hinge body 7b.
In addition, although it is desirable to use the said pull style hinge as the hinge member 7 which can be used for this embodiment, it is also possible to use another commercially available hinge member.

(Procedure for installing the pipe heat insulating device of the present invention)
Next, a procedure for covering the outer peripheral surface of the bent pipe 9 arranged in accordance with the curved through hole 13 by the pipe heat insulating device 1 of the present invention will be described.
FIG. 8 shows a state in which the heat insulating panels 2 </ b> A and 2 </ b> B are disposed on the bent pipe 9. The bent pipe 9 has a predetermined curvature and is installed so as to pass through the curved through hole 13 provided in the concrete wall 14. In addition, although the clearance gap S provided between the outer peripheral surface of the bending piping 9 and the through-hole 13 is a magnitude | size that it is difficult for a person to enter and work, it is larger than the thickness of the heat insulation panels 2A and 2B. large.

  First, as shown in FIG. 8 (a), in the bent pipe 9 outside the through-hole 13, the heat insulating panels 2A and 2B are arranged inside and outside the bent pipe 9, respectively. The overlap member 6 provided on the bottom plate 3a of the heat insulating panels 2A and 2B is abutted against each other so that the joint between the adjacent heat insulating panels 2A and 2B can be covered from the outside. Then, the male member 5a and the female member 5b of the buckle type connecting portion 5 provided on the outer plate 3d of the heat insulating panels 2A and 2B are engaged and tightened so that the heat insulating panels 2A and 2B are bent in the circumferential direction of the pipe 9. They are connected to form one ring-shaped cylinder 10.

  Next, as shown in FIG. 8 (b), the ring-shaped cylindrical body 10 is pushed toward the through hole 13, and is slightly slid in the longitudinal direction of the bent pipe 9, so that the next heat insulation panels 2A and 2B The ring-shaped cylindrical body 10 is formed by repeatedly connecting the heat insulating panels 2A and 2B by the buckle type connecting portion 5 in the same manner as described above.

Then, as shown in FIG. 8C, the two formed ring-shaped cylinders 10 are connected via hinge members 7 (hinge bodies 7a and 7b) provided on the respective heat insulating panels 2B. . At this time, the two connected ring-shaped cylinders 10 are connected so as to be swingable with respect to each other in the bending direction of the bent pipe 9.
After that, as shown in FIG. 1, the pipe insulation apparatus 1 of the present invention is formed by repeating the above-described operations (formation of the ring-shaped cylinder 10, connection of the ring-shaped cylinder 10, and push-in movement). The outer peripheral surface of the bent pipe 9 in the through hole 13 is covered.

[Second Embodiment]
The pipe heat insulating device 1 (second embodiment) of the present invention can cover the outer peripheral surface of the bent pipe 9 arranged in accordance with the curved through hole 13 as in the first embodiment. A ring-shaped cylindrical body that can cover and cover the outer peripheral surface of the bent pipe 9 over the entire circumference by connecting heat-insulating panels 2C and 2D, which will be described later, which can be connected and separated in the pipe circumferential direction. It can be formed by providing a plurality of 10 in the longitudinal direction of the curved pipe and sequentially connecting the plurality of ring-shaped cylinders 10.

(Insulation panel)
FIG. 9 shows heat insulation panels 2C and 2D constituting the pipe heat insulation apparatus 1 (second embodiment) of the present invention.
<Insulation panel 2C>
As shown in FIG. 9, the heat insulation panel 2C is a plate-like panel main body 3 (made of stainless steel), a futon-like heat insulating material 19 (rock wool or the like wrapped in a glass cloth or the like, sewn, and used for heat insulation. The size of the panel body 3 is slightly smaller than the futon-like heat insulating material 19.
The panel body 3 is curved so as to be along the outer peripheral surface of the bent pipe to be insulated, and the engagement convex portion 20 bent outward is formed at both ends thereof, and the cross section is bent into a U-shape. Engaging recesses 21 are provided. As shown in FIG. 10, the panel body 3 (dotted line portion) has a trapezoidal shape (the length of the lateral width X of the engaging concave portion 21> the length of the lateral width Y of the engaging convex portion 20), and is insulated. When the panel 2C is disposed in the bent pipe, the side surfaces of the heat insulating panels 2C adjacent to each other in the longitudinal direction of the bent pipe (side surfaces of the futon-like heat insulating material 19) can be joined.
On the back side of the panel body 3, as in the first embodiment, contact portions 4 (four locations) having ball bearings 4 a are provided. A hook-and-loop fastener 22 (a connecting fastener 22a and a receiving fastener 22b) used when assembling and connecting is provided.

<Insulation panel 2D>
As shown in FIG. 9, the heat insulation panel 2D is a sheet-like panel body 3 (made of stainless steel) similar to the heat insulation panel 2C, in which a futon-like heat insulating material 19 (rock wool or the like is wrapped with glass cloth or the like and sewn). And can be used for heat insulation and heat insulation), and the size of the panel body 3 is configured to be slightly smaller than the futon-like heat insulation material 19.
The panel body 3 is curved so as to be along the outer peripheral surface of the bent pipe to be insulated, and the engagement convex portion 20 bent outward is formed at both ends thereof, and the cross section is bent into a U-shape. Engaging recesses 21 are provided. Further, as shown in FIG. 10 (in parentheses), the panel body 3 (dotted line portion) has a trapezoidal shape (the length of the lateral width Y of the engaging concave portion 21 <the length of the lateral width X of the engaging convex portion 20). When the heat insulating panel 2D is disposed in the bent pipe, the side surfaces of the heat insulating panels 2D adjacent to each other in the longitudinal direction of the bent pipe (side surfaces of the futon-like heat insulating material 19) can be joined. .
On the back side of the panel body 3, as in the first embodiment, contact portions 4 (four locations) having ball bearings 4 a are provided. A hook-and-loop fastener 22 (a connecting fastener 22a and a receiving fastener 22b) used when assembling and connecting is provided.

(Ring-shaped cylinder)
FIG. 11 is a cross-sectional view of the heat insulating panels 2C and 2D disposed on the bent pipe 9 to form the ring-shaped cylinder 10 and viewed from the axial direction of the bent pipe 9.
In the abutting portion 4 of the heat insulating panels 2C and 2D, a spring member 11 (biasing means) produced by bending an appropriate metal plate in a step shape is attached to the ball bearing 4a, and one end of the spring member 11 is attached to the panel body 3. It was fixed by spot welding. At this time, the ball bearing 4 a is supported so as to be movable in the perspective direction with respect to the outer peripheral surface of the bent pipe 9.
Even when there is some design error when the heat insulating panels 2C and 2D are arranged on the outer peripheral surface of the bent pipe 9, the bent pipe 9 is in contact with the ball bearing 4a of the contact portion 4 by the action of the spring member 11. Since it is biased toward the outer peripheral surface, it can always be in contact with the outer peripheral surface of the bent pipe 9.
That is, the ball bearing 4 a can rotate in any direction, not limited to the longitudinal direction of the bent pipe 9, while always contacting the outer peripheral surface of the bent pipe 9. Therefore, by forming the ring-shaped cylinder 10 using the heat insulating panels 2C and 2D including the ball bearing 4a, the ring-shaped cylinder 10 can be slid in the longitudinal direction of the bent pipe 9.

12 and 13 show how the ring-shaped cylindrical body 10 is formed using the heat insulating panels 2C and 2D.
As shown in FIGS. 12 and 13, in the bent pipe 9, the heat insulating panels 2C and 2D are arranged inside and outside the bent pipe 9, respectively, and the engaging convex part 20 and the engaging concave part 21 of the heat insulating panel 2D are provided. Inserted into the engagement recess 21 and the engagement protrusion 20 of the heat insulation panel 2C (the length of the lateral width Y of the engagement protrusion 20 of the heat insulation panel 2C = the length of the width Y of the engagement recess 21 of the heat insulation panel 2D) The width X of the engagement recess 21 of the heat insulation panel 2C is equal to the length X of the engagement protrusion 20 of the heat insulation panel 2D. The two heat insulation panels 2C and 2D are connected in the circumferential direction of the bent pipe 9. After that, it is fixed via the surface fasteners 22 (connection fasteners 22a and receiving fasteners 22b) provided on the futon-like heat insulating materials 19 of the heat insulating panels 2C and 2D, thereby forming one ring-shaped cylindrical body 10.

(Procedure for installing the pipe heat insulating device of the present invention)
Next, a procedure for covering the outer peripheral surface of the bent pipe disposed in accordance with the curved through-hole using the above-described heat insulating panels 2C and 2D will be described.
FIG. 14 shows a state in which a heat insulating panel is disposed on the bent pipe 9. The bent pipe 9 has a predetermined curvature and is installed so as to pass through the curved through hole 13 provided in the concrete wall 14. In addition, although the clearance gap S provided between the outer peripheral surface of the bending piping 9 and the through-hole 13 is a magnitude | size which is difficult for a person to enter and work, it is larger than the thickness of the heat insulation panels 2C and 2D. large.

  First, as shown in FIGS. 12 to 13 and FIG. 14A, in the bent pipe 9 outside the through-hole 13, the heat insulating panels 2C and 2D are arranged inside and outside the bent pipe 9, respectively. Then, the engagement convex part 20 and the engagement concave part 21 (not shown) of the heat insulation panel 2D are inserted into the engagement concave part 21 and the engagement convex part 20 (not shown) of the heat insulation panel 2C, respectively. The heat insulating panels 2C and 2D are connected in the circumferential direction of the bent pipe 9 to form one ring-shaped cylinder 10.

  Next, as shown in FIG. 14 (b), the ring-shaped cylindrical body 10 is pushed toward the through hole 13 and is slid slightly in the longitudinal direction of the bent pipe 9, so that the next heat insulation panels 2C and 2D The ring-shaped cylindrical body 10 is formed by repeatedly connecting the engagement projections 20 and the engagement recesses 21 of the heat insulating panels 2C and 2D in the same manner as described above.

Then, as shown in FIG. 14C, the two formed ring-shaped cylinders 10 are connected via a hook-and-loop fastener 22 provided on the futon-shaped heat insulating material 19 (one ring-shaped cylinder). The connecting fastener 22a provided on the other ring-shaped cylinder is brought into close contact with the receiving fastener 22b). At this time, the two ring-shaped cylinders 10 connected to each other are swingably connected to each other, and can also swing in the bending direction of the bent pipe 9.
After that, by repeating the above-described operations (formation of the ring-shaped cylinder 10, connection of the ring-shaped cylinder 10, and push-in movement), the pipe heat insulating device 1 of the present invention is formed, and the bending in the through hole 13 is performed. The outer peripheral surface of the pipe 9 is covered (not shown).

[Other Embodiments]
1. In the second embodiment, in order to connect the heat insulating panels 2C and 2D adjacent to each other in the pipe circumferential direction, the engaging convex portion 20 and the engaging concave portion 21 are used, and the adjacent ring-shaped cylindrical body 10 is connected. However, the present invention is not limited to this. For example, as shown in FIG. 15, a plurality of hook members 25 are provided on the futon-like heat insulating material 19, and the hooks are used. You may make it connect the heat insulation panels 2C and 2D adjacent to the piping circumferential direction, and the ring-shaped cylinder 10 adjacent to each other by hooking the suitable wire (steel wire etc.) 26 to the member 25. At this time, the two ring-shaped cylinders 10 connected to each other are swingably connected to each other, and can also swing in the bending direction of the bent pipe 9.
As shown in FIGS. 16 and 17, the hook member 25 is fixed on the futon-like heat insulating material 19 by a pin member 28 and a stop plate 29. That is, the pin member 28 penetrates the heat insulating panel 2C or 2D in the thickness direction, and a hook member 25 (futon-like heat insulating material 19 side) and a stop plate 29 (panel body 3 side) are provided at both ends thereof. Is provided.
2. In the pipe heat insulating device of the present invention, a heat insulating material that can be expanded and contracted may be interposed between a plurality of ring-shaped cylinders to be connected.
3. The number of heat insulating panels constituting one ring-shaped cylindrical body is not limited to the above-described embodiment, and any number can be set as long as the present invention can be configured.
4). As pipes to which the pipe heat insulating device of the present invention can be applied, for example, various reactor pipes (coolant pipes, etc.) in nuclear power plants, various pipes (hot water supply pipes and air conditioning pipes) that can be installed in general factory equipment, etc. Etc.), but is not limited thereto.

The top view which shows a mode that the curved piping outer peripheral surface in the through-hole was coat | covered with the piping heat insulation apparatus (1st Embodiment) of this invention. External appearance perspective view of heat insulation panel 2A and 2B which comprises the piping heat insulation apparatus (1st Embodiment) of this invention The top view of heat insulation panel 2A and 2B which comprises the piping heat insulation apparatus (1st Embodiment) of this invention. Sectional drawing when the ring-shaped cylinder formed by arranging the heat insulating panels 2A and 2B on the bent pipe is viewed from the axial direction of the bent pipe The perspective view which shows a mode that the two ring-shaped cylinders formed on the bending piping were connected so that rocking was possible in the bending direction of bending piping. The figure which shows the two ring-shaped cylinders in a separated state The figure which shows the two ring-shaped cylinders in a connection state The top view which shows a mode that heat insulation panel 2A and 2B are arrange | positioned to bending piping. External appearance perspective view of heat insulation panel 2C and 2D which comprises the piping heat insulation apparatus (2nd Embodiment) of this invention. Plan view schematically showing the heat insulation panel 2C or 2D Sectional drawing when the ring-shaped cylinder formed by arranging the heat insulating panels 2C and 2D on the bent pipe is viewed from the axial direction of the bent pipe The perspective view which showed a mode that a ring-shaped cylinder was formed using the heat insulation panels 2C and 2D. Side view when the state of forming the ring-shaped cylinder using the heat insulating panels 2C and 2D is viewed from the axial direction of the bent pipe Side view showing a state in which the heat insulating panels 2C and 2D are arranged in the bent pipe The perspective view which shows other embodiment of this invention The perspective view of the ring-shaped cylinder in other embodiment of this invention Sectional drawing when the ring-shaped cylinder in other embodiment of this invention is seen from the axial center direction of bending piping The top view which shows the coating method of the curved pipe outer peripheral surface in the conventional through-hole

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Piping heat insulation apparatus 2 Heat insulation panel 3 Panel main body 4 Contact part 4a Rotating body 5 Buckle type connection part 5a Male member 5b Female member 6 Overlap member 7 Hinge member 8 Bolt 9 Curved piping 10 Ring-shaped cylinder 11 Spring member 12 Installation Space 13 Through-hole 14 Concrete wall 15 Heat insulating material 16 Reflector plate 17 Recessed portion 18 Hinge body convex portion 19 Futon-like heat retaining material 20 Engaging convex portion 21 Engaging concave portion 22 Hook fastener 25 Hook member 26 Wire 27 Fiber thermal insulation Material 28 Pin member 29 Stop plate

Claims (6)

A plurality of ring-shaped cylinders that can cover and insulate the outer peripheral surface of the bent pipe over the entire circumference and can be connected and separated from each other in the longitudinal direction of the pipe are provided, and the ring-shaped cylinders can be connected and separated in the pipe circumferential direction. It is a pipe heat insulating device composed of a plurality of heat insulating panels,
A rotating body that can abut on the outer peripheral surface of the bent pipe and is rotatable in the longitudinal direction of the outer peripheral surface is provided on the inner surface of the heat insulating panel, and the ring-shaped cylinder is slid in the longitudinal direction of the bent pipe. A pipe heat insulating device in which the plurality of ring-shaped cylinders are connected to each other so as to be swingable in the bending direction of the bent pipe.   The pipe heat insulating device according to claim 1, wherein the plurality of ring-shaped cylinders are connected to each other through a hinge member so as to be swingable.   3. The hinge member is configured such that the pair of hinge bodies can be connected to and separated from each other with respect to a pair of hinge bodies that can swing with respect to each other via a pivot shaft. The pipe heat insulating device described in 1.   The pipe heat insulating device according to claim 1, wherein the plurality of ring-shaped cylinders are connected to each other through a surface fastener so as to be swingable.   The pipe heat insulating device according to claim 1, wherein the plurality of ring-shaped cylinders are connected to each other through a wire so as to be swingable.   The pipe heat insulating device according to any one of claims 1 to 5, wherein a heat insulating material that is stretchable is interposed between the plurality of ring-shaped cylinders to be connected.

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