JP2011133154A - Heat exchange pipe unit and method of laying heat exchange pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange pipe unit and a method of laying a heat exchange pipe, capable of easily and accurately performing laying work in a laying site and preventing scratches on the surface of the heat exchange pipe during the laying work. <P>SOLUTION: By folding back the flexible heat exchange pipe 21 for a plurality of times, a plurality of stages of horizontal parts 22 are formed at predetermined intervals, and the plurality of stages of horizontal parts 22 are fixed to holding members 31 holding the intervals of the plurality of stages of horizontal parts 22, so as to constitute the heat exchange pipe unit 10. Before laying of the heat exchange pipe 21, the plurality of stages of horizontal parts 22 are rolled up from the end side to enable carrying. During laying of the heat exchange pipe, at the laying site, the heat exchange pipe unit 10 is returned from the rolled up state enabling carrying and is arranged in a hole or a groove in the laying site with the plurality of stages of horizontal parts 22 held by the holding members 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat exchange pipe unit buried in the ground in a ground heat utilization system and a method for laying a heat exchange pipe.

  The geothermal heat utilization system is a system that uses underground heat for heating, cooling, etc., and heat exchange pipes are underground, and a heat circulation pump and a heat exchanger are connected to the heat exchange pipes. Then, a heat medium such as liquid or gas is caused to flow through the heat exchange pipe, and the heat of the heat medium is taken out by the heat exchanger and used.

  Conventional laying of heat exchange pipes in the ground has a vertical method and a horizontal method. In the vertical system, the heat exchange pipe is bent in a U shape at the lower end in a vertical hole dug nearly 10 to 100 m at the laying place and installed in the vertical direction, and then the hole is backfilled (Patent Document 1). . On the other hand, in the horizontal method, the heat exchange pipe is folded back along the horizontal direction at a depth of 0.2 to 2 m from the ground surface and embedded in the ground (Patent Document 2).

  The vertical method has a serious problem because the hole has to be dug deeply vertically. On the other hand, in the horizontal system, a series of heat exchange pipes must be bent and arranged at the site and fixed at a predetermined position. In addition, the heat exchange pipe must be bent or partially moved when laying underground, so the heat exchange pipe hits and the surface is damaged, and the heat exchange pipe is in operation while the underground heat utilization system is in operation. May burst at the wound.

JP 2001-289533 A JP 2006-207919 A

  The present invention has been made in view of the above-described points, and is a heat exchange pipe unit that can easily and accurately perform a laying operation at a laying site and that does not easily damage the surface of the heat exchange pipe during the laying operation. And to provide a method for laying heat exchange pipes.

  According to the first aspect of the present invention, a plurality of flexible heat exchange pipes are folded back to form a plurality of horizontal portions at predetermined intervals, and the plurality of horizontal portions are fixed to a holding member that holds the interval between the horizontal portions. A heat exchange pipe unit, wherein before the heat exchange pipe is laid, the plurality of horizontal portions are rolled from the end side and rolled, and when the heat exchange pipe is laid, Returning from the rounded state, the horizontal portions of the plurality of stages of the heat exchange pipe are arranged in the holes or grooves in the laying site while being kept spaced by the holding member. Heat exchange pipe unit.

  The invention of claim 2 is the state of claim 1, wherein the holding member is composed of a support column orthogonal to the plurality of horizontal portions, and the lower end portion of the support column protrudes from the lowest horizontal portion of the plurality of steps. A plurality of the support posts are fixed to the horizontal portions of the plurality of steps at a predetermined interval, and the support posts are pierced at the bottoms in the holes or grooves of the installation site when the heat exchange pipes are installed. It is characterized by being.

  According to a third aspect of the present invention, in the first aspect, the holding member is made of a flexible net-like body.

  According to a fourth aspect of the present invention, the heat exchange pipe unit in a rounded state according to any one of the first to third aspects is returned from the rounded state at a laying site of the heat exchange pipe, and a plurality of the heat exchange pipes are returned. The present invention relates to a method for laying a heat exchange pipe, characterized in that a horizontal portion of a step is disposed in a hole or groove in the laying site while being held by the holding member, and then the hole or groove is backfilled.

  According to the heat exchanging pipe unit and the heat exchanging pipe laying method of the present invention, the heat exchanging pipe unit is folded (rolled) in advance in such a state that a plurality of heat exchanging pipes are folded back and fixed to the holding member. The heat exchange pipe is transported to the laying site, the winding of the heat exchange pipe unit is unwound at the laying site and placed in the hole or groove on the site, and the hole or groove is refilled. It is not necessary to refill the hole or groove while being drawn, folded back and placed at a predetermined position, and the laying operation is simplified. Also, since it is not necessary to bend or partially move the heat exchange pipe when laying in the ground, the surface of the heat exchange pipe is damaged by colliding with a tool such as a scoop or a tool for digging a hole or groove. It is possible to prevent sticking, and it is possible to prevent the heat exchange pipe from bursting at the scratched part during operation of the underground heat utilization system.

It is a perspective view which shows the state which wound the heat exchange pipe unit which concerns on 1st Example of this invention roundly. It is a front view which shows the state before winding the heat exchange pipe unit of the Example roundly. It is a front view which shows the state which turned up the heat exchange pipe used for the heat exchange pipe unit of the Example. It is a perspective view which shows the other example of the fixing member for fixing a heat exchange pipe to a holding member. It is a perspective view which shows the time of arrange | positioning the heat exchange pipe unit which concerns on 1st Example of this invention in the hole of a construction site. It is a top view which shows the state which wound the heat exchange pipe unit which concerns on 2nd Example of this invention roundly. It is a front view which shows the state before winding the heat exchange pipe unit of the Example roundly. It is a front view which shows the state which turned up the heat exchange pipe used for the heat exchange pipe unit of the Example. It is a perspective view which shows the time of arrange | positioning the heat exchange pipe unit of the Example to the hole of a construction site. It is sectional drawing which shows the other laying state using the heat exchange pipe unit which concerns on 2nd Example.

Hereinafter, the Example of the laying method of the heat exchange pipe unit and heat exchange pipe of this invention is described.
1 and 2 show a heat exchange pipe unit 10 according to a first embodiment of the present invention. FIG. 1 shows a state in which the heat exchange pipe unit 10 is rolled up, while FIG. 2 shows a state before the heat exchange pipe unit 10 is rolled up.

The heat exchange pipe unit 10 includes a heat exchange pipe 21 and a holding member 31.
The heat exchange pipe 21 is a flexible pipe that can be bent. Examples of the flexible pipe include those made of resin such as polyethylene. The diameter and length of the heat exchange pipe 21 are determined as appropriate, and examples include an outer diameter of about 10 to 30 mm and a length of about 10 to 100 m. As shown in FIG. 3 showing the heat exchange pipe 21 before the heat exchange pipe 21 is fixed to the holding member 31, the heat exchange pipe 21 is bent a plurality of times with a predetermined length so that the horizontal portion 22 has a plurality of stages (in the drawing, at predetermined intervals) (Four stages). The horizontal portion 22 is a portion that is horizontal when the heat exchange pipe is laid. The interval between the horizontal portions 22 (the vertical interval between the horizontal portions 22 at the time of laying) a1 is set as appropriate, and an example is about 10 to 50 cm. Moreover, although the space | interval b1 between the folding | returning parts 23 in the said horizontal part 22 is suitably set according to the width of the installation site, etc., about 5-30 m is mentioned as an example. In addition, the length of the horizontal parts 22a and 22b which become the uppermost stage and the lowermost stage at the time of laying so that the ends 25 and 26 of the heat exchange pipe 21 can be connected to the heat exchanger and circulation pump installed at the laying site. It is preferable that the length is longer than the horizontal portions 22c and 22d in the other stages so as to project a required amount from the folded portion 24 on the one side.

  The holding member 31 holds the interval between the horizontal portions 22 of the plurality of stages, and in this embodiment, includes a support column 32 orthogonal to the horizontal portions 22 of the plurality of stages. The support 32 constituting the holding member 31 is made of a rod-like body having rigidity capable of holding the interval between the horizontal portions 22 of the heat exchange pipe 21, such as a steel pipe or a resin pipe, and the heat exchange pipe 21 is folded back. Is longer than the height h1 (distance between the uppermost and lowermost horizontal portions) h1. The diameter of the support column 32 is appropriately determined, and an example is about 10 to 40 mm. A plurality of the columns 32 are used, and the lower end portion 33 of the column 32 protrudes downward from the lowermost horizontal portion 22b, and the fixing member 41 is fixed to the plurality of horizontal portions 22 at a predetermined interval c1. It is fixed with. An example of the interval c1 between the support columns 32 is about 10 to 200 cm.

  The fixing member 41 is not particularly limited as long as it can fix the heat exchange pipe 21 to the holding member 31. Examples of the fixing member 41 include a wire, a string, a binding band, or a clip 51 shown in FIG. The clip 51 has a support fixing part 53 in which the support fitting part 52 is turned sideways, and a heat exchange pipe fixing part 55 in which the heat exchange pipe fitting port 54 faces upward.

  The heat exchange pipe unit 10 of FIG. 2 in which the plurality of horizontal portions 22 are fixed to the holding member 31 is rolled up from the one end side and rolled as shown in FIG. In this state, the heat exchange pipe unit is transported to the laying site. In addition, in order to maintain the rounded state, it is preferable to tie the part of the said horizontal part 22 with the binding members 61, such as a band and a string.

  Next, a method for laying a heat exchange pipe using the heat exchange pipe unit 10 will be described. The heat exchanging pipe unit 10 that has been rolled up and transported is transported to a heat exchanging pipe laying site, the winding of the heat exchanging pipe unit 10 is returned at the laying site, and a hole dug in the laying site as shown in FIG. The heat exchange pipe unit 10 is housed in 71, and the lower end 33 of the support column 32 is pierced into the bottom surface 72 of the hole 71 at that time, and the horizontal portion 22 of the heat exchange pipe 21 is disposed horizontally. . With the arrangement, the plurality of horizontal portions 22 are arranged vertically from the uppermost to the lowermost. Thereafter, when the hole 71 is backfilled, the laying operation is completed. The end portions 25 and 26 of the heat exchange pipe 21 extend to the ground and are connected to a circulation pump and a heat exchanger (not shown). In addition, the hole dug in the laying site may be a groove having a width of about 60 cm so that the unwound heat exchange pipe unit 10 can be stored in a straight line as it is.

  According to the method of laying a heat exchange pipe using the heat exchange pipe unit 10, a plurality of heat exchange pipes can be obtained simply by returning the heat exchange pipe unit 10 from a rounded state and placing the heat exchange pipe unit 10 in a hole or groove on the laying site. Can be placed in a hole or groove in a folded state, eliminating the need to refill a hole or groove while routing a series of heat exchange pipes in a narrow hole or groove and repeatedly folding and placing in place Laying work can be done easily. In addition, it is not necessary to bend or partially move the heat exchange pipe during installation work in narrow holes or grooves, so the heat exchange pipe collides with tools such as scoop holes or grooves to exchange heat. It is possible to prevent the surface of the pipe from being damaged, and it is possible to prevent the heat exchange pipe from being ruptured at the damaged portion during operation of the underground heat utilization system.

  The heat exchange pipe unit 10A of the second embodiment shown in FIG. 6 and FIG. 7 is the same as the heat exchange pipe unit 10 of the first embodiment except that the holding member 31A is made of a mesh body 32A. is there. In addition, about the part of the same name in 1st Example and 2nd Example, the same number is used, and the alphabet A is attached to 2nd Example, and it becomes easy to understand a common part. The confusion prevention of 1st Example and 2nd Example was aimed at.

  As shown in FIG. 8, the heat exchanging pipe unit 10A of the second embodiment folds the flexible heat exchanging pipe 21A a plurality of times to form a plurality of horizontal portions 22A at a predetermined interval a2, and then to FIG. As shown, the plurality of horizontal portions 22A are fixed to a holding member 31A that holds the intervals between the plurality of horizontal portions 22A by a fixing member 41A. Before laying the heat exchange pipe, the heat exchange pipe unit 10A is wound around the plurality of horizontal portions 22A from one end side, and is brought into a transportable state in a rolled state as shown in FIG. Then, it is transported from the factory of the heat exchange pipe unit to the laying site. In order to maintain a rounded state, it is preferable to tie the portion of the horizontal portion 22A with a binding member 61A such as a band or a string.

  The mesh body 32A as the holding member 31A is a flexible material that can be bent, and an appropriate material such as a wire mesh or a resin mesh is used. The mesh body 32A is not particularly limited as long as it can maintain the interval a2 between the horizontal portions 22A of the plurality of stages at the time of laying. The mesh 32 has a size that can fix the plurality of horizontal portions 22A, that is, a length that is substantially equal to the interval b2 between the folded portions 23A in the horizontal portion 22A, and the heat exchange pipe 21A is folded. The width (the distance between the end 22Aa of the horizontal portion 22A and the other end 22Ab) may be a width substantially equal to h2, or may be a width larger than a required amount by h2. Reference numerals 22Ac and 22Ad denote horizontal portions of intermediate stages.

  As the fixing member 41A for fixing the horizontal portion 22A of the heat exchange pipe 21A to the mesh body 32A, an appropriate member such as a wire or a string is used. Reference numerals 25A and 26A denote end portions of the heat exchange pipe 21A.

  A method for laying a heat exchange pipe using the heat exchange pipe unit 10A of the second embodiment will be described. The heat exchange pipe unit 10A is transported to the laying site in a rolled state as shown in FIG. 6, and the heat exchange pipe unit 10A is unwound at the laying site and stored in the hole 71A dug in the laying site as shown in FIG. At that time, the mesh body 32A is leveled and the horizontal portion 22A of the heat exchange pipe 21A is placed horizontally on the bottom surface 72A of the hole 71A. In the second example, since the holding member 31A is a net 32A, unlike the holding member 31 of the first embodiment, the interval a2 of the horizontal portion 22A of the heat exchange pipe may fluctuate during transportation and laying. is there. Therefore, at the time of laying, the horizontal portions 22Aa and 22Ab at the ends of the mesh body 32A or the heat exchange pipe are pulled outward in the width h2 direction, and the heat exchange pipe unit 10A is placed on the bottom surface 72A of the hole 71A. Thus, the interval a2 between the horizontal portions 22A can be set to the interval set at the time of factory shipment. After placing the heat exchange pipe 21A in the hole 71A, if the hole 71A is backfilled, the laying operation is completed. End portions 25A and 26A in the length direction of the heat exchange pipe 21A extend to the ground and are connected to a circulation pump and a heat exchanger (not shown).

  In addition, it is preferable that the mesh body 32A is located below the horizontal portion 22A of the heat exchange pipe 21A during the laying. When the mesh body 32A is placed on the upper side, when the horizontal portion 22A of the heat exchange pipe is disposed on the bottom surface 72A of the hole 71A, the horizontal portion 22A of the heat exchange pipe may be rubbed against the bottom surface of the hole and may be damaged. When refilling the hole, the mesh body 32A obstructs and the soil does not reach the horizontal part 22A side of the heat exchange pipe, and there is a possibility that a cavity may be formed around the horizontal part 22A of the heat exchange pipe. Therefore, it is preferable to lay the mesh body 32A so as to be below the horizontal portion 22A of the heat exchange pipe.

  Further, when the heat exchange pipe unit 10A of the second embodiment is installed in the hole 71A, the plurality of heat exchange pipe units 10A are arranged so that the mesh body 32A is horizontal, and the mesh body 32A and the heat The horizontal part 22A of the exchange pipe may be laid so as to have a predetermined vertical interval. FIG. 10 shows a state in which a plurality of heat exchange pipe units 10A are laid in such a manner that the mesh body 32A and the horizontal portion 22A of the heat exchange pipe are horizontal at predetermined vertical intervals. Reference numeral 45A denotes the ground surface. Also in this case, it is preferable to lay the heat exchange pipe 21A so that the mesh body 32A is located below the horizontal portion 22A of the heat exchange pipe.

  When the mesh body 31A is made of a highly shape-retaining material such as a wire mesh, a groove is dug in place of the hole 71A, and the width direction of the mesh body 31A is raised in the groove, that is, The heat exchange pipe 21A may be laid such that the plurality of horizontal portions 22A are arranged at a predetermined interval between the uppermost stage and the lowermost stage.

  In the laying method of the second embodiment, the same effect as the laying method of the first embodiment can be obtained. That is, by simply returning the heat exchange pipe unit 10A from the rounded state and placing the heat exchange pipe unit 10A in the hole or groove, the heat exchange pipe can be disposed in the hole or groove in a state where the heat exchange pipe is bent back and forth. It is not necessary to refill the hole while drawing the heat exchange pipe in a narrow hole or groove and folding it back and forth and arranging it at a predetermined position, so that the laying operation can be performed easily. In addition, since it is not necessary to bend or partially move the heat exchange pipe during installation in a narrow hole or groove, the surface of the heat exchange pipe is damaged by colliding with a tool such as a scoop. It is possible to prevent the heat exchange pipe from bursting at the scratched part during operation of the underground heat utilization system.

  As described above, according to the present invention, it is possible to easily and accurately perform the laying work at the laying site of the heat exchange pipe, and it is possible to prevent the surface of the heat exchange pipe from being damaged during the laying work.

10, 10A Heat exchange pipe unit 21, 21A Heat exchange pipe 22, 22A Horizontal portion 23, 23A Folded portion 31, 31A Holding member 32 Post 32A Net-like body 71, 71A Laying site hole 72, 72A Bottom of hole

Claims (4)

A heat exchange pipe unit in which a plurality of flexible heat exchange pipes are folded back to form a plurality of horizontal portions at a predetermined interval, and the plurality of horizontal portions are fixed to a holding member that holds the interval between the horizontal portions. ,
Before laying the heat exchange pipe, the plurality of horizontal portions are rolled up from the end side and rolled, and when the heat exchange pipe is laid, it is returned from the rounded state at the laying site. The heat exchanging pipe unit is characterized in that a plurality of horizontal portions of the heat exchanging pipe are arranged in a hole or a groove in the laying site with the holding member kept at intervals. The holding member is composed of a support column orthogonal to the plurality of horizontal portions,
A plurality of the pillars are fixed to the horizontal parts of the plurality of stages at a predetermined interval with the lower end of the pillars protruding from the horizontal part of the lowest stage of the plurality of stages,
2. The heat exchange pipe unit according to claim 1, wherein when the heat exchange pipe is laid, one end of the pillar is pierced into a bottom surface in a hole or a groove in the laying site.   The heat exchange pipe unit according to claim 1, wherein the holding member is made of a flexible net-like body.   The rounded heat exchange pipe unit according to any one of claims 1 to 3 is returned from the rounded state at a laying site of the heat exchange pipe, and a plurality of horizontal portions of the heat exchange pipe are held by the holding unit. A method for laying a heat exchange pipe, wherein the heat exchange pipe is placed in a hole or groove in the laying site while being held by a member, and then the hole or groove is backfilled.

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