JP2006225916A - Heat insulating panel for curved surface in heat storage tank, and method of sticking heat insulating material to curved surface of heat storage tank using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate replacement work of a heat insulating layer at a communicating hole part for connecting adjacent heat insulating layers. <P>SOLUTION: A heat insulating panel 10 for a curved surface in a heat storage tank is formed of three or more curved heat insulating plates 11 made of foam resin to form a continuous curved body 15 by bringing the axial end faces into mutual abutting contact, and a waterproof sheet 12 stuck to the inner peripheral surface side of the curved body formed of the curved heat insulating plates. The heat insulating panel 10 for the curved surface in the heat storage tank can selectively take an open attitude of forming the continuous curved body (a cylindrical body) 15 and an attitude of turning in the adjacent curved heat insulating plates at a joint part. In the turned-in attitude, the heat insulating panel 10 is sized to be able to pass through a narrow opening 24 of a manhole or the like formed in the heat storage tank 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat insulating panel for a curved surface in a heat storage tank and a method for attaching a heat insulating material to the curved surface of a heat storage tank using the same, particularly in a curved surface portion such as a communicating pipe portion of an existing underground heat storage tank. Heat insulation panel for heat storage tank curved surface that can facilitate the work of installing a heat insulation panel on the inner wall surface of the concrete frame, and heat insulation to the curved surface of the heat storage tank using the heat insulation layer using it The present invention relates to a method for pasting materials.

  As an energy-saving system for buildings, etc., a heat storage tank is installed in the basement, and hot or cold water is generated and stored in the tank using cheap electric power at night, and this is circulated in the building in the daytime. Air-conditioning systems that reduce the total cost required for air-conditioning have become widespread. When constructing a heat storage tank to be used in such a system, usually a concrete box is first formed in a box shape, and then a heat insulating material such as a resin foam is pasted on the inner wall surface to form a heat insulating layer. Further, a waterproof layer made of a waterproof sheet or the like is formed thereon.

  It is also possible to divide the heat storage tank into two or more and connect them with a communication pipe. As with the inner wall surface of the box-shaped concrete frame, a heat insulating material is attached to such a communicating pipe portion, and a waterproof layer is formed as necessary. The communicating pipe portion is usually cylindrical and has a relatively small diameter. Patent Document 1 discloses a proposal for facilitating attachment of a heat insulating material to such a portion to improve workability. There, a plurality of divided heat insulating materials having the same curvature that are combined to form a cylindrical shape are prepared, and are sequentially attached to the inner peripheral surface of the communicating pipe portion.

  By the way, when constructing a new heat storage tank, it is normal that the upper part of the box-shaped concrete frame is a wide open space, and materials for forming a heat insulating layer and a waterproof layer are required at the time of construction. There is no particular problem in carrying it into the construction space in the concrete frame. After the heat insulation layer and waterproof layer are formed, ceiling work is performed on the upper open part and it is closed, and an opening like a manhole is formed in part so that the worker can perform maintenance during maintenance such as cleaning. It is possible to enter the tank and carry the tool in and out.

  In the heat storage tank as described above, it may be necessary to replace the heat insulating layer or the waterproof layer after construction. In order to replace the heat insulating layer or the like, first, it is necessary to remove the existing heat insulating layer or waterproof layer from the inside of the tank. This work can be easily done by entering the tank with the equipment from the opening such as a manhole, destroying the existing heat insulation layer or waterproof layer to an appropriate size, and removing the waste material from the opening. it can.

  After that, equipment such as a heat insulation panel for a new heat insulation layer will be carried into the tank, but the opening such as a manhole provided for maintenance is usually about 600 mm in diameter, and more It is not possible to carry a heat insulation panel having a width of Therefore, for example, when the place where the heat insulating material is attached is a communication pipe portion between heat insulating layers, as described in Patent Document 1, a curved heat insulating material with a narrow width divided into a plurality of parts should be used. By this, it becomes possible to carry it into the tank that is the work place from the opening of the manhole having a small diameter during work, and the workability is improved.

JP 2001-13993 A

  However, it is not easy to attach the curved heat insulating material divided into a plurality of pieces to the inner peripheral surface while aligning them one by one in a narrow space that is a communication pipe.

  The present invention has been made in view of the circumstances as described above, and when it is necessary to renovate an existing heat storage tank, in particular, in a region having a curved surface such as a communicating pipe portion thereof. To provide a heat insulation panel for a curved surface of a heat storage tank that can greatly facilitate the work of attaching a new heat insulating layer, and a method for attaching a heat insulating material to the curved surface of the heat storage tank using the same. Objective.

  The thermal insulation panel for a curved surface in a heat storage tank according to the present invention has three or more curved thermal insulation plates that form a continuous curved body by bringing the end surfaces in the axial direction into contact with each other, and a curved line formed by the curved thermal insulation plate. A connecting sheet pasted so as to be along the joint between each curved heat insulating material on the inner peripheral surface side of the body, each curved heat insulating plate, an open posture to form a continuous curved body, It is designed to selectively take the position of the adjacent curved heat insulating plate folded at the joint, and in the folded position, the size can pass through a narrow opening such as a manhole formed in the heat storage tank. And

  The curvature of each curved heat insulating plate is made to coincide with the curvature of the curved surface to be pasted, but when the pasting surface is a cylindrical surface like the communicating pipe part, the radius of curvature of each curved heat insulating plate is Are the same radius of curvature.

  A curved heat insulating plate having a groove formed on the outer peripheral surface side can be used. In thermal insulation panels for curved surfaces in heat storage tanks using curved heat insulating plates of this shape, when they are attached to curved inner peripheral surfaces such as concrete enclosures or communication pipes of heat storage tanks, spring water from the concrete is There is an advantage that drainage grooves are formed simultaneously.

  The method of attaching the heat insulating material to the curved surface of the heat storage tank according to the present invention is a posture in which the heat insulation panel for the curved surface in the heat storage tank is folded and passed through a narrow opening such as a manhole of the heat storage tank into the heat storage tank. It is carried in and the posture is opened so as to form a curved body in the curved surface portion in the heat storage tank after carrying in, and the heat insulation panel for the curved surface in the heat storage tank in that posture is attached to the curved surface portion in the heat storage tank, To do.

  The thermal insulation panel for a curved surface in a heat storage tank according to the present invention can be folded as a whole, and the width is narrowed in the folded state. Therefore, it can be easily carried into the tank through a narrow opening such as a manhole attached to the existing heat storage tank. After carrying in, the bent body is changed from the folded position to an open position, thereby forming a curved body in which three or more curved heat insulating plates are continuous. In this state, it can be attached to the required curved wall in the heat insulation tank, so there is no need to align multiple curved heat insulation plates individually in a narrow space, and construction efficiency is greatly improved. .

  In the present invention, the curved surface part in the heat storage tank to be constructed is typically the inner peripheral surface part of the communication pipe connecting between the adjacent heat storage tanks, but the manhole serving as the entrance to the heat storage tank It may be an inner peripheral surface or an inner peripheral surface of an appropriate cylindrical portion, or a wall surface portion having a curvature formed at a corner portion between inner wall surfaces. In addition, as described above, the curvature of each curved heat insulating plate is preferably the same as the curvature of the curved surface portion in the heat storage tank to be constructed, but even if different, the curved heat insulating plate made of foamed resin By applying and pasting while deforming, construction in a close contact state is possible. In this case, as described above, the curved heat insulating plate in which the groove is formed on the outer peripheral surface side is more easily deformed, and thus the effect of facilitating the close pasting work together with the function of forming the spring water drainage channel. Will also be brought.

  In addition, when a heat insulation panel for a curved surface in a heat storage tank is attached to a cylindrical inner peripheral surface portion such as an inner peripheral surface portion of a communication pipe, the size of the panel is a closed cylindrical shape (a circular cross section is preferable, It is preferable to have a size capable of forming an ellipse, an ellipse, etc.), but it may be a size that creates a gap between the opposing end faces or a size that partially overlaps. . In the former case, if necessary, the gap portion is filled with another foamed resin material.

  In the present invention, the connecting sheet may be any sheet that can be integrated in a state in which two curved heat insulating plates facing each other in parallel can be folded, such as a pressure-sensitive adhesive tape attached along the joint. It may be anything. However, in the case of a heat storage tank, it is necessary to form a waterproof layer on the formed heat insulation layer, and when the connection sheet has only a connection function, a separate waterproof layer is applied after the heat insulation panel is attached. Work to form is required. In order to avoid this, a waterproof sheet having a size capable of covering at least the entire surface of each curved heat insulating plate is used as the connecting sheet, and the inner sheet of the curved heat insulating plate is used with an appropriate adhesive. It is desirable to use the heat insulation panel for curved surfaces in the heat storage tank in a form pasted on the peripheral surface side. Thereby, it becomes possible to construct a heat insulation layer and a waterproof layer simultaneously.

  In the above case, it is more preferable that the connecting sheet has a size having a portion extending further outward from one side edge of the heat insulation panel for the curved surface in the heat storage tank. In the heat insulation panel of this aspect, when each of the curved heat insulation plates forms a closed cylindrical body in an open posture, the contact portion between the end faces can be covered with a portion extending to the outside of the sheet. Therefore, the water-stopping and waterproofing properties of the abutting portions between the end faces can be further ensured.

In the present invention, a polystyrene resin, a polypropylene resin, a polyethylene resin, or the like is preferably used as the material resin for the curved heat insulating plate, which is a foamed resin. The density is 10 to 150 kg / m ³ , more preferably 20 to 100 kg / m ³ . In the case where a waterproof sheet is used as the connecting sheet, examples of such a sheet include a synthetic resin sheet and a rubber sheet. Synthetic resin-based sheets include polyolefin-based resin sheets, polyethylene-based resin sheets, polypropylene-based resin sheets, vinyl chloride-based resin sheets, EVA-based resin sheets, etc. Rubber-based sheets include vulcanized rubber-based sheets and non-vulcanized rubber-based sheets A sheet etc. can be mentioned.

  According to the present invention, in an underground heat storage tank provided with a heat insulating layer, for some reason, it is necessary to replace the heat insulating layer in the curved inner peripheral surface, particularly in the communication hole portion connecting adjacent heat insulating layers. The replacement work can be performed easily and with less construction man-hours. Further, according to the present invention, even when a heat storage tank is newly constructed, after the ceiling construction of the box-shaped concrete frame is performed, the heat insulation panel for the curved surface in the heat storage tank is carried in from a narrow opening such as a manhole. Thus, it is possible to perform the heat insulation layer construction easily and with less construction man-hours.

  Hereinafter, the present invention will be described based on embodiments. FIG. 1 is a view showing one embodiment of a heat insulating panel for a curved surface in a heat storage tank according to the present invention, FIG. 1a is a perspective view in a folded position, FIG. 1b is a perspective view in an opened position, and FIG. The posture is shown from the side. FIG. 2 is a schematic view for explaining a method of attaching the heat insulation panel for the curved surface in the heat storage tank shown in FIG. 1 to the inner peripheral surface of the communication pipe of the heat storage tank. 3-5 has shown the other form of the heat insulation panel for curved surfaces in a thermal storage tank.

  A heat insulation panel 10 for a curved surface in a heat storage tank according to the present invention shown in FIG. 1 includes three curved heat insulation plates 11 (11a, 11b, 11c) having an equal length L in the axial direction. Each curved heat insulating plate 11 is curved in an arc shape with the same radius of curvature, and constitutes one cylindrical body (curved body) 15 by adopting a posture in which end faces in the axial direction are brought into contact with each other. ing. The three curved heat insulating plates 11a, 11b, and 11c have different arc angles. In this example, the curved heat insulating plate 11a has an arc angle α of approximately 105 degrees and the curved heat insulating plate 11b has an arc angle β of approximately 135 degrees. The arc angle θ of the heat insulating plate 11c is approximately 120 degrees. The arc angle is set as appropriate in consideration of the ease of folding work and the posture after folding.

  The curved heat insulating plate 11 is preferably a foamed polystyrene plate and has a thickness of about 10 to 150 mm. Considering the heat insulation environment required at the construction site of the heat storage tank, the size of the cylindrical portion on which the heat insulation layer is to be formed, etc., the thickness is made optimum.

  A sheet 12 having waterproof properties such as a polypropylene resin sheet is bonded and laminated on the inner peripheral surface side of the three curved heat insulating plates 11, and the three curved heat insulating plates 11 are end faces in the axial direction. In the state where the side edges on the inner peripheral surface side are in contact with each other, they are integrated by the waterproof sheet 12 so as not to be separated. However, as shown in FIG. 1a, the end surfaces (side edges) of the first curved heat insulating plate 11a and the third curved heat insulating plate 11c are not connected to each other, and the third curved heat insulating plate 11c. From the side edge in the non-connected state, the adhered waterproof sheet 12 extends 12a to the outside (the first curved heat insulating plate 11a side).

  The heat insulation panel 10 for the curved surface in the heat storage tank has the above-described configuration, and the second heat insulation plate 11b and the third heat insulation plate 11c shown in FIG. It is possible to selectively take the folded-out posture as the outside and the open posture, that is, the posture constituting the cylindrical body 15 shown in FIG. 1b or 1c. In the folded posture, the lateral width is narrower than the diameter of the cylindrical body 15 made in the open posture. Further, in the open posture, the end surfaces (side edges) of the first curved heat insulating plate 11a and the third curved heat insulating plate 11c are in contact with each other, and the joint surface is attached to the inner peripheral surface. The waterproof sheet 12 is covered with the extended portion 12a.

  A method of forming a heat insulating layer on the inner peripheral surface of the communication pipe 21 between the two heat storage tanks 20 and 20 will be described using the heat storage tank curved surface heat insulating panel 10 described above. As shown in FIG. 2, the existing underground heat storage tank 20 has a box-shaped concrete casing portion 22 composed of four side walls and a bottom portion, and a ceiling portion 23 that closes the top portion thereof. In part, an opening 24 such as a manhole having a relatively narrow entrance width having a diameter of about 600 mm for use during maintenance or the like is usually formed.

  For some reason, it is necessary to tear down the heat insulating layer formed on the inner wall surface of the existing heat storage tank 20 and the inner peripheral surface of the communication pipe 21 and re-form the heat insulating layer by newly attaching a heat insulating plate. In this case, the operator enters the heat storage tank 20 together with necessary equipment from the opening 24, tears down the existing waterproof layer and heat insulating layer, and carries it out from the opening 24. Thereafter, the heat storage tank inner wall surface insulating material 26 and the heat storage tank inner curved surface heat insulating panel 10 to be newly attached are carried into the heat insulating layer 20, and in that case, the heat storage tank inner curved surface heat insulating panel 10. Since the horizontal width of the heat insulating tank curved surface heat insulating panel 10 is narrowed as shown in FIG. 1a, it can be carried into the tank from the existing opening 24 without any trouble. By configuring the heat storage tank inner wall surface heat insulating material 26 so as to be foldable in the same manner, it becomes easy to carry it into the tank.

  The operator affixed the heat storage tank inner wall surface heat insulating material 26 to the inner wall surface of the heat storage tank 20 and opened the heat insulation tank inner curved surface heat insulation panel 10 carried into the tank in a folded position half-opened in the tank. The posture is taken, and it is brought into the fully open state by bringing it into the communication pipe 21 where the adhesive is applied to the inner peripheral surface as necessary, and pressing it against the wall surface from the inside while positioning as required. Thereby, as shown in FIGS. 1b and 1c, the heat insulation tank 10 for the curved surface in the heat storage tank brought in is in a state of a cylindrical body 15 in which the end faces are all in contact with each other, and the newly formed joining surface is the waterproof sheet 12. It is covered with the extended part 12a.

  Thus, by using the heat insulation panel 10 for the curved surface in the heat storage tank according to the present invention, the replacement work of the heat insulation layer and the waterproof layer on the inner peripheral surface of the communication pipe 21 in the heat storage tank 20 can be completed simultaneously with a small number of man-hours. can do. In addition, when it is planned to construct the waterproof layer in a separate process, it is not shown, but instead of the waterproof sheet 12, it follows the joint portion between the curved heat insulating materials on the inner peripheral surface side of each curved heat insulating plate 11. Then, a connecting sheet such as an adhesive tape may be simply pasted. It will be understood that even in this case, the above-described open position and folded position can be selectively taken.

  FIG. 3 shows a heat insulating tank curved surface heat insulation panel 10A according to another embodiment. Here, the required number of first grooves 16 extending in the axial direction are formed on the outer peripheral surface of each curved heat insulating plate 11. Moreover, FIG. 4 shows the heat insulation tank internal heat insulation panel 10B according to still another embodiment, and here, the first groove 16 extending in the axial direction and the circumferential extension of the first heat insulation plate 11 on the outer peripheral surface of each curved heat insulation plate 11. The required number of second grooves 17 are formed.

  In either case, the folded position (FIGS. 3a and 4a) and the open position (FIGS. 3b and 4b) can be selectively taken as in the case of FIG. The first and second grooves 16 and 17 formed on the outer peripheral surface after being attached to the concrete frame function effectively as a drainage channel for discharging spring water that springs from the concrete frame, and the life of the heat insulation layer It brings merit of prolonging. Furthermore, by forming such grooves 16 and 17 on the outer peripheral surface side, the deformability of the curved heat insulating plate 11 made of foamed resin is improved, so that the curvature of the curved heat insulating plate 11 and the curvature of the inner peripheral surface of the communication pipe are reduced. Even in the case where there is a deviation, it is easy to apply the adhesive in a close contact state.

  In the above example, the heat insulation tank inner curved surface heat insulation panel 10 is composed of the three curved heat insulation plates 11. However, a larger number of heat insulation tank inner curved surface heat insulation panels 10 of the same size are used. The curved heat insulating plate 11 may be used. Thereby, the width in the folded position can be further reduced. The one in FIG. 5 a is made of twelve curved heat insulating plates 11, and the one in FIG. 5 b is made of four curved heat insulating plates 11. It can be seen that the cylindrical body 15 has the same size in the open posture, but the size differs in the folded posture.

  Further, in the above example, the complete cylindrical body 15 is shown in the open posture, but as shown in FIG. It may be the one that constitutes the curved body 15a whose part is open, or the one that constitutes the curved body 15b that partially overlaps as shown in FIG. 5d. These can be used as appropriate in a reduced-diameter posture, an enlarged-diameter posture, or a partially-removed posture so as to fit the size of the pasting area at the construction site. . Furthermore, it is desirable that the curvature of each curved heat insulating plate is the same, but it may be different depending on the situation of the construction site.

  Although not shown, even when the corner portions of the inner wall surfaces of the heat storage tank 20 are formed to have a curvature, by using the heat insulating tank inner curved surface heat insulating panel 10 according to the present invention, it is easy to use. A heat insulating layer can be formed. In that case, the curved heat insulating plate 11 preferably has a curvature that matches the curvature of the corner portion.

It is a figure which shows one form of the heat insulation panel for curved surfaces in a thermal storage tank by this invention, FIG. 1a is a perspective view of the folded-in position, FIG. 1b is a perspective view of an open position, FIG. FIG. It is the schematic for demonstrating the method to affix the heat insulation panel for curved surfaces in a thermal storage tank shown in FIG. 1 to the internal peripheral surface of the communicating pipe of a thermal storage tank. It is a perspective view which shows the other form of the heat insulation panel for curved surfaces in a thermal storage tank, FIG. 3a has shown the folded position, FIG. 3b has shown the open attitude | position. It is a perspective view which shows the other form of the heat insulation panel for curved surfaces in a thermal storage tank, FIG. 4a has shown the attitude | position folded, and FIG. 4b has shown the open attitude | position. 5a to 5d show still other four forms of the heat insulation panel for the curved surface in the heat storage tank.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Thermal insulation panel for curved surfaces in thermal storage tank, 11 (11a, 11b, 11c) ... Curved thermal insulation board, 15 ... Cylindrical body (curved body) formed, 12 ... Waterproof sheet, 12a ... Extension part of waterproof sheet, DESCRIPTION OF SYMBOLS 20 ... Thermal storage tank, 21 ... Communication pipe, 22 ... Concrete frame part, 23 ... Ceiling part, 24 ... Opening part like a manhole, 16, 17 ... Groove formed in the outer peripheral surface of a curved heat insulation board

Claims (7)

  A heat insulating panel for a curved surface in a heat storage tank, which is formed by three or more foamed resin curved heat insulating plates that form a continuous curved body by bringing the end faces in the axial direction into contact with each other, and the curved heat insulating plate And a connecting sheet pasted so as to be along the joint portion between the respective curved heat insulating materials on the inner peripheral surface side of the curved body, and each curved heat insulating plate is opened to form a continuous curved body. The posture and the posture where the adjacent curved heat insulating plate is folded at the joint can be selectively taken, and in the folded posture, the size can pass through a narrow opening such as a manhole formed in the heat storage tank. A heat insulating panel for a curved surface in a heat storage tank that can be folded.   The thermal insulation panel for a curved surface in a heat storage tank according to claim 1, wherein the curvature radii of the curved thermal insulation plates are the same.   The heat insulation panel for a curved surface in a heat storage tank according to claim 1 or 2, wherein a groove is formed on an outer peripheral surface side of all or part of the curved heat insulation plate.   The connecting sheet is a waterproof sheet having a size capable of covering at least the entire inner peripheral surface side of the three or more curved heat insulating plates. Thermal insulation panel for curved surface in heat storage tank.   5. The heat insulation panel for a curved surface in a heat storage tank according to claim 4, wherein the connecting sheet has a portion extending further outward from one side edge of the heat insulation panel for a curved surface in the heat storage tank.   As a posture in which the heat insulation panel for the curved surface in the heat storage tank according to any one of claims 1 to 5 is folded, it passes through a narrow opening such as a manhole of the heat storage tank and is carried into the heat storage tank. A heat insulating material for the curved surface of the heat storage tank, wherein the heat insulating tank has an open posture that forms a curved body in the curved surface portion, and a heat insulating panel for the curved surface in the heat storage tank is attached to the curved surface portion in the heat storage tank in that posture. How to paste.   The method of attaching a heat insulating material to a curved surface of a heat storage tank according to claim 6, wherein the curved surface part in the heat storage tank is a communicating pipe part between the heat storage tanks.

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