JPH0627905U - Road heating panel and its piping connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a road heating panel and its pipe connection structure that are easy to construct, have little loss of heat radiation in the ground, and can be easily connected to pipes. [Structure] The heating medium pipes 3 and 4 are arranged on the upper surface of the heat insulating mat 2, and the aluminum sheet 5 covering the upper surface of the heat insulating mat 2 is arranged on the heat medium pipes 3 and 4 to form the load heating panel 1. To do. The heat insulating mat 2 is made of foamed resin such as Styrofoam. The heat medium pipes 3 and 4 circulate hot water, and use crosslinked polyethylene pipes. The heat medium pipes 3 and 4 are fixed to the heat insulating mat 2 by hitting the inverted U-shaped pipe stopper 6 having retaining hooks at both ends to the heat insulating mat 2. The pipe connection between the load heating panels 1 is performed via a plug-in type tubular joint fitting 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a road heating panel that is buried in the ground to keep the ground warm to prevent snow and prevent freezing, and a pipe connection structure thereof.

[0002]

[Prior art]

 In the past, when road heating was applied to the ground to remove snow and prevent freezing, piping that circulates a heating medium such as hot water was directly piped underground in the field. In this case, cross-linked polyethylene pipe is used for the piping in consideration of corrosion prevention.

[0003]

[Problems to be solved by the device]

 However, in the conventional road heating construction, piping work must be performed on site, which is not easy and the heat insulation of the ground is not performed. There was a problem that the heat insulation efficiency of the ground was lowered because it was absorbed inside. Further, since the cross-linked polyethylene pipe used as the heat medium pipe is made of a material that cannot be heat-welded, an expensive joint is required for its connection, and the construction is troublesome.

[0004] In order to facilitate on-site construction, there is also proposed a road heating panel in which piping is provided in advance to form a panel. However, in the conventional panel method, since the finishing and heat storage layers were set, it was heavy and not easy to construct.

An object of the present invention is to provide a load heating panel and a pipe connection structure thereof, which are easy to construct, have a small heat radiation loss in the ground, and can be easily connected to pipes.

[0006]

Means for Solving the Problems In a load heating panel of the present invention, a heat transfer medium pipe is arranged on an upper surface of a heat insulating mat, and a heat conductive sheet covering the upper surface of the heat insulating mat is arranged on the heat medium pipe. It is a thing. The heat medium pipe may be fixed to the heat insulating mat by hitting an inverted U-shaped pipe stopper having retaining claws at both ends to the heat insulating mat so as to straddle the heat medium pipe.

The pipe connection structure of the present invention is a pipe connection structure between the load heating panels in which cross-linked polyethylene pipes are used as the heat medium pipes, and both ends are inserted into the ends of the heat medium pipes of both panels. The pipes are connected to each other with a tubular fitting. This fitting has a tapered outer peripheral surface on both ends, a stopper flange in the center, and retaining tabs on both sides.

[0008]

[Action]

 According to the load heating panel of this configuration, since the pipes have been preliminarily piped, it is only necessary to connect the pipes between the panels and the pipe from the hot water source to the panel on site, and the construction can be facilitated. In addition, since there is a heat insulating mat, the heat radiation loss in the ground can be minimized. The heat conductive sheet has the function of spreading the heat of the heat medium pipe in a planar manner and transmitting it to the ground, improving snow melting efficiency. When the above-mentioned pipe stopper is used, the heat medium pipe can be fixed to the heat insulating mat by a simple operation of driving the pipe stopper from one side. Also, according to this pipe connection structure, since the fitting metal fittings whose outer peripheral surface is a taper surface and has a retaining tab are used, the heat medium piping consisting of cross-linked polyethylene pipes of both panels can be easily connected by inserting the fitting fittings. And, it can be connected surely. The pressure resistance of the heat transfer medium pipe may be relatively low, and even such a plug-in connection does not cause a leakage problem. The stopper flange at the center of the fitting is a positioning means that limits the insertion depth of the heat medium piping on both sides.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. As shown in a perspective view in FIG. 1, the load heating panel 1 has heat transfer pipes 3 and 4 for the outward path and the return path arranged on the upper surface of the heat insulating mat 2 and a heat conductive sheet 5 covering the upper surface of the heat insulating mat 2. It is arranged on the heat medium pipes 3 and 4. As the material of the heat insulating mat 2, urethane foam, polystyrene foam, or other foam resin is used. As for the dimensions of the heat insulating mat 2, for example, if the thickness is 30 mm or more, and the vertical and horizontal dimensions are 1820 mm × 910 mm, 910 mm × 910 mm, 1820 mm × 455 mm, 910 mm × 455 mm, etc. Depending on the terrain, on-site construction can be easily performed by combining the above.

The outward heat medium pipe 3 is a pipe for supplying a heat medium such as hot water from a heat medium supply source (not shown), and is arranged in a meandering shape from one side to the other side of the heat insulating mat 2. It The return heat medium pipe 4 is a pipe for recovering the heat medium supplied to the outward heat medium pipe 3 to the heat medium supply source, and is arranged linearly from one side to the other side of the heat insulating mat 2. It Cross-linked polyethylene pipes are used for these heat medium pipes 3 and 4. The heat conductive sheet 5 conducts the heat radiation from the heat medium pipes 3 and 4 in a planar manner to improve the efficiency of heat radiation to the ground, and is made of a film material such as aluminum.

A pipe stopper 6 shown in FIG. 2 is used for fixing the heat medium pipes 3 and 4 to the heat insulating mat 2. The pipe stopper 6 is made by bending a strip-shaped metal plate into a U shape, and has acute-angled insertion claws 6a formed at both ends thereof, and the retaining claws 6b are cut-and-raised pieces near both ends. Has been formed. The heat medium pipes 3 and 4 are fixed to the heat insulating mat 2 by striking the heat insulating mat 2 so as to straddle the heat medium pipes 3 and 4. The pipe stopper 6 may be a metal wire rod.

To fix the heat medium pipes 3 and 4 to the heat insulating mat 2, for example, as shown in FIG. 6, a fastener 16 and a base material 17 arranged on the back surface of the heat insulating mat 2 are connected by bolts 18 and nuts 19. Alternatively, as shown in FIG. 7, it is also possible to push the stopper 16 onto the heat insulating mat 2 with the bolt 18 that penetrates the heat insulating mat 2 and is screwed into the base material 17 arranged on the back surface thereof. . However, in these cases, since the number of constituent members increases, the cost increases, and the fixing work becomes complicated, it is desirable to use the pipe stopper 6 of FIG. According to the pipe stopper 6 of FIG. 2, the fixing can be easily performed only by driving from one side, and the pipe stopper 6 has a simple structure and can be inexpensive.

The heating medium pipes 3 and 3 and the heating medium pipes 4 and 4 are connected to each other between the load heating panels 1 through the cylindrical joint fitting 7 shown in FIG. The fitting 7 is made of brass alloy or the like and has a tapered surface 7a so that the outer peripheral surface is narrowed from the center toward both ends. In addition, a stopper flange 8 is provided in the center, and a plurality of retaining claws 9 are provided on the outer peripheral surfaces on both sides. The connection of the heat medium pipes 3 and 4 with the joint metal fitting 7 is performed as follows in the procedure shown in FIG.

First, a fitting 7 is driven into one end of the heat medium pipes 3 and 4 of one panel 1 as shown in FIG. 5 (A). Then, one end of the heat medium pipes 3 and 4 of the other panel 1 is heated by, for example, the electric heater 10 as shown in FIG. 5 (B). Since the heat medium pipes 3 and 4 are made of cross-linked polyethylene having thermoplasticity, the composition is transparently deformed and plasticized by this heat treatment. In this state, one end of the heat medium pipes 3, 4 is inserted into the other half of the fitting 7 as shown in FIG. 5 (C). When the heat is cooled, the ends of the inserted heat medium pipes 3 and 4 return to their original composition and are firmly connected to the joint metal fitting 7, and the joints are completely sealed.

During construction, the road heating panel 1 is placed in the ground and subjected to the above-mentioned pipe connection, and then covered with soil or a mat or asphalt placed thereon. . The heat medium pipes 3 and 4 are connected to each other at the end of the array of the panels 1 to form one path. The beginning and the end of this path are connected to the discharge port and the recovery port of the heat medium supply source, respectively.

The heat of the heat medium that is circulated and supplied from the heat medium supply source through the heat medium pipes 3 and 4 is radiated from the heat medium pipes 3 and 4 in each road heating panel 1, and passes through the heat conductive sheet 5 and the surface. Conducted in a shape. Radiation of heat from the heat medium pipes 3 and 4 to the ground is blocked by the heat insulating mat 2, and most of the heat is radiated toward the ground. In this way, there is little heat dissipation loss to the ground, and since it is possible to heat the ground surface-wise, it is possible to effectively prevent the ground from freezing and to melt snow efficiently, and obtain an energy saving effect.

Further, according to this load heating panel 1, since the heat medium pipes 3 and 4 are provided in the panel 1 in advance, the pipe connection between the panels 1 and the pipe from the hot water source to the panel 1 are performed on site. All that is required is easy construction. Easy design and integration. Further, since this panel 1 is composed of the heat insulating mat 2 made of foamed resin, the heat medium pipes 3 and 4 of the cross-linked polyethylene pipe, and the heat conductive sheet 5, it is lightweight, and therefore construction is possible. Will be even easier. For these reasons, it does not require a professional job and can be easily installed by a landscape builder. Moreover, since the heat insulating mat 2 is made of a foaming resin, it is easy to adapt to the unevenness of the ground, so that the mounting surface of the panel 1 does not need to be leveled and the workability is improved.

Further, by using the joint metal fitting 7 for connecting the heat medium pipes 3 and 4 between the panels 1, it is possible to easily connect in a plug-in form. The fitting 7 mentioned above is to be inserted and connected, but since it has the retaining claw 9, it is sure to prevent coming off, and the proof stress generally required for the heat medium pipes 3 and 4 is 2 kg / cm ² Since it is the following, leakage can be sufficiently prevented.

[0019]

[Effect of device]

 The load heating panel of the present invention has a heat transfer medium pipe arranged on the upper surface of the heat insulating mat, and a heat conductive sheet covering the upper surface of the heat insulating mat from above the heat medium pipe. It requires no plumbing work and can be easily installed by landscape gardeners without the need for professionals. In addition, since there is a heat insulating mat, there is less heat dissipation loss in the ground, and the efficiency of heat dissipation to the ground is improved.

As a pipe stopper for fixing the heat medium pipe, an inverted U-shaped pipe having retaining hooks at both ends is used, and when the pipe is fixed to the heat insulating mat, the backing base or the like for fixing the pipe is used. The number of parts can be reduced because it is unnecessary, and it can be easily fixed by working from one side.

In addition, in the pipe connection structure of the present invention, since the outer peripheral surface is formed into a tapered surface that narrows to both ends, and the joint fitting having the stopper flange and the retaining claw is used, the bridge of the material excellent in the heat medium pipe is formed. When a polyethylene pipe is used, the heat medium pipes can be connected between the panels easily and reliably with a fitting type fitting having a simple structure.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a pipe stopper used in the embodiment.

FIG. 3 is a cross-sectional view showing a fixed state of the pipe by the pipe stopper.

FIG. 4 is a front view of a joint fitting used in the embodiment.

FIG. 5 is an explanatory view showing a pipe connection procedure using the joint fitting.

FIG. 6 is a cross-sectional view showing an example of a pipe fixing state using another example of the pipe stopper.

FIG. 7 is a cross-sectional view showing a pipe fixing state using still another example of the pipe stopper.

[Explanation of symbols]

1 ... Road heating panel, 2 ... Insulation mat, 3,
4 ... Heat medium piping, 5 ... Thermal conductive sheet, 6 ... Piping stopper metal, 6b ... Retaining pawl, 7 ... Joint metal fitting, 7a ... Tapered surface, 8 ... Stopper flange, 9 ... Retaining pawl

Claims (3)

[Scope of utility model registration request] 1. A load heating panel comprising a heat insulating mat, a heat medium pipe arranged on an upper surface of the heat insulating mat, and a heat conductive sheet covering the upper surface of the heat insulating mat from above the heat medium pipe. 2. The heat medium pipe is fixed to the heat insulating mat by striking an inverted U-shaped pipe stopper having retaining claws on both ends so as to straddle the heat medium pipe. Road heating panel. 3. A pipe connection structure between load heating panels according to claim 1, wherein a cross-linked polyethylene pipe is used for the heat transfer medium pipe, wherein both ends are inserted into the end portions of the heat transfer medium pipes of both panels. -Like fitting metal fittings are provided, and the outer peripheral surface of this fitting metal fitting is a tapered surface that narrows toward both ends,
A pipe joint structure with a stopper flange in the center and retaining hooks on both sides.