JPS639646Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a water pipe antifreeze device suitable for use in water pipes in extremely cold regions.

(Prior Art) Conventionally, antifreeze devices for preventing water pipes from freezing in winter include non-electrical devices,
electrical ones are known. Typical non-electrical insulation materials include cylindrical insulation materials made of polystyrene foam or the like that directly cover water pipes, and insulation materials made of various other materials are also known. On the other hand, as an electric type, there is a type using electric heating means such as a strip heater wrapped around a water pipe.

(Problems to be Solved by the Invention) However, the above-mentioned conventional antifreeze device has the following problems.

First, although non-electric devices are inexpensive, they all have low antifreeze effects, and the reality is that they cannot provide sufficient antifreeze protection, especially in extremely cold regions. In addition, all electrical devices consume power, and when used for a long period of time, electricity costs increase and breakdowns are more likely to occur.

(Means for Solving the Problems) The present invention relates to a water pipe antifreeze device that eliminates the above problems, and its main components are as shown in Figure 1, from the vicinity of the faucet 2 to the A heat insulating cylindrical body 5 is disposed substantially coaxially with respect to the water pipe 4 leading to the water pipe 4, covers the water pipe 4, and forms a sealed hollow part S1 inside, and a hollow body 6 buried in the ground 3. The hollow part S1 and the chamber part S2 of the hollow body 6 are connected to each other.

(Operation) Next, the operation of the present invention will be explained. It is known that the temperature inside the underground 3 is usually higher than the atmospheric temperature due to geothermal heat, and that water pipes 4 buried at least 30 cm or more underground are kept sufficiently warm without freezing. Therefore,
The air in the chamber S2 of the hollow body 6 buried underground has a large heat capacity due to geothermal heat, and this air
By causing convection within the hollow portion S1 of the heat insulating cylinder 5 which communicates with the heat insulating cylinder 5, a rational and high heat insulating effect is obtained.

(Embodiments) Below, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a side sectional view of the antifreeze device according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an exploded perspective view clearly showing the heat insulating cylinder, and Fig. 4 is a hollow FIG.

First, the illustrated water pipe 4 consists of a main pipe 4a buried approximately horizontally in the ground 3, and a vertical branch pipe 4b branched from the main pipe 4a into a T-shape via a pipe joint.
A faucet 2 is connected to the upper end of this branch pipe 4b.
Generally, the main pipe 4a is buried at a depth of about 1 m below the ground, which is sufficient for heat retention.

The outer peripheral surface of the water pipe 4, especially the branch pipe 4b, has a third
The half-cylindrical heat insulating material 10 shown in the figure is tightly covered from both sides (FIG. 2). The insulation 10 may be a conventional insulation material, such as styrofoam. Note that the heat insulating material 10 may be a band-shaped heat insulating material or the like, and may be omitted particularly in the present invention.

Next, a semi-cylindrical semi-insulating body 5a shown in FIG.
A pair of these are prepared and the outer peripheral portion of the heat insulating material 10 is covered from both sides. In this case, a plurality of protrusions 11 for positioning are provided on the inner peripheral surface of the semi-insulating material 5a along the axial direction, so that when attached, it is fitted coaxially to the outer peripheral portion of the insulating material 10. and the heat insulating cylindrical body 5
A hollow portion S1 is formed along the axial direction between the outer circumferential surface of the heat insulating material 10 and the inner circumferential surface of the heat insulating cylinder 5. This heat insulating cylinder 5 can also be made of a heat insulating material such as expanded polystyrene. An end face portion is provided at the upper end of the heat insulating cylinder 5, and when attached, the hollow portion S1 is closed and the hollow portion S1 is hermetically sealed.
Further, the length of the heat insulating cylindrical body 5 is formed to extend from the vicinity of the faucet 2 to the underground 3 as shown in FIG. Note that the heat insulating cylinder 5 and the heat insulating material 10 may be integrally molded, and an air jacket similar to the hollow portion S1 may be formed within the wall.

On the other hand, the hollow body 6 has an upper surface portion 6a and can be formed into a cylindrical shape with an open bottom. The volume of the interior S1 of the hollow body 6 is formed to be relatively large so that the interior air can be kept sufficiently warm. The upper surface part 6a is formed into an umbrella shape, and has a circular hole 20 in the center through which the water pipe 4 passes, and a large number of small holes 21 arranged in a ring shape around the circular hole 20. This small hole 2
1... is for making the hollow part S1 and the chamber part S2 of the hollow body 6 communicate with each other. The hollow body 6 can be formed, for example, as a clay pipe. On the other hand, there is a rib plate 2 inside which has holes 22 for both reinforcement and position regulation.
3 etc. can be provided. Further, the heat insulating cylinder 5
Similarly, a pair of left and right halves may be combined facing each other.
Note that it is also possible to integrate it with the cylindrical body 5 by selecting a material.

Such hollow body 6 is at least from the ground to underground 3.
It is buried to a depth of about 30 cm or more, and the lower end of the heat insulating cylinder 5 comes into contact with the upper end. Thus, the hollow body S1 sealed with the chamber S2 of the hollow body 6 is connected to the small hole 21.
Communicate via...

As a result, the cold air in the hollow part S1 descends and is heated in the hollow body chamber S2, and the heated air in the chamber S2 rises into the hollow part S1 and flows (convection). )I do. Therefore, in combination with the double-walled heat insulating material, a sufficient heat insulating effect can be obtained.

Note that FIG. 5 shows another embodiment. This figure is a side sectional view showing the lower part of the antifreeze device. Fifth
The embodiment shown in the figure is different from the embodiment shown in FIG. By connecting S2, the heat retention (warming) effect is further enhanced.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments. For example, the shape, size, and location of the hollow bodies 6, 40 can be changed arbitrarily. In addition, if the water pipe 4 is installed in a different location, for example, along the wall of a house, the heat insulating cylinder 5 and the hollow body 6 can be made half-cut so that the water pipe 4 is sandwiched between the wall and the wall. Other details,
Arbitrary changes in shape etc. that do not depart from the gist of the present invention are permitted within the scope of the present invention.

(Effect of the invention) As described above, the water pipe antifreeze device according to the present invention is arranged approximately coaxially with the water pipe from near the faucet to underground, and covers the water pipe and seals the inside. It comprises a heat insulating cylinder forming a hollow part and a hollow body buried underground, and the hollow part and the chamber of the hollow body are communicated with each other, so that the following remarkable effects are obtained.

First, it was confirmed that the anti-freeze effect is extremely high and does not freeze at all even when the outside temperature is around -16°C. Therefore, it is especially suitable for use in extremely cold regions.

Second, there is no need for maintenance costs such as electricity charges,
Furthermore, high reliability can be maintained without causing any failures.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side sectional view of the antifreeze device, and FIG.
3 is an exploded perspective view showing the heat insulating cylinder, FIG. 4 is a perspective view of the hollow body, and FIG. 5 is a side sectional view showing the lower part of the antifreeze device according to another embodiment. . In addition, in the drawing, 1... antifreeze device, 2... faucet,
3...Underground, 4...Water pipe, 4a...Main pipe, 4b
... Branch pipe, 5 ... Heat insulating cylinder, 6 ... Hollow body, S
1...Hollow part, S2...Chamber part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A heat-insulating cylindrical body disposed approximately coaxially with a water pipe extending from the vicinity of the faucet to underground, covering the water pipe, and forming a sealed hollow inside; What is claimed is: 1. A water pipe antifreeze device, comprising: a hollow body embedded therein; and the hollow body communicates with a chamber of the hollow body. 2. The water pipe antifreeze device according to claim 1, wherein the hollow body is arranged substantially coaxially with respect to the water pipe.