JPS6312972B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a water supply antifreeze device.

(Prior Art) In cold regions, water pipes freeze during the winter as well as during the day. In general, measures to prevent this freezing include installing drain valves to drain the water from the water pipes when not in use, or allowing the water to flow without stopping, or installing antifreeze in the water pipes. Countermeasures have been taken, such as installing electric heaters.

However, each of these measures has drawbacks, such as the troublesome work of draining water and increased water or electricity charges.

Therefore, as a solution to this problem, a system has been devised in which a heat-retaining pipe having a spacer inside is inserted around the outer periphery of the water pipe, and has been put into practical use (Japanese Patent Publication No. 58-2301). In other words, a spacer is provided inside a heat insulating material inserted in a heat insulating pipe to allow hot water to flow, and this heat insulating pipe is inserted into a water pipe, so that even if the water pipe freezes, the water produced by the spacer will This is an antifreeze system for water supplies that easily thaws ice by pouring warm water into the space between the pipe and the heat insulating material, and has achieved good results.

The present invention is a further improvement to the above-mentioned water supply anti-freezing device.

(Object of the invention) By adding the above-mentioned improvements, the present invention can effectively prevent or thaw water water.
Another object of the present invention is to provide a water supply antifreeze device that can be easily installed.

(Structure of the Invention) In order to achieve the above-mentioned object, the present invention provides an outer skin for a branch pipe leading from a main water pipe to a faucet or drain valve.
It is characterized by a structure in which a heat insulating tube made of a heat insulating material and having grooves for circulating a thermal fluid is inserted inside the outer skin.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of this embodiment.

A branch pipe 2 is branched from a main water pipe 1 buried underground, and a faucet 3 is attached to the tip of the branch pipe 2. Note that 4 is the floorboard of the house. The outer peripheries of the straight part and the elbow part of the branch pipe 2 are respectively covered by a plurality of heat retention tubes 5 and 6, and the heat retention pipe 5 that covers the branch pipe 2 above the main pipe 1 is partially buried underground. It is in a state of stagnation.

These heat insulating tubes 5 and 6 each consist of an outer skin 7 made of the same material and a heat insulating material 8 inserted inside the outer skin 7. Inside the heat insulating material 8, there is a groove 8a for flowing a thermal fluid such as hot water. is formed. Also,
A cap 9 is installed at the hot water inlet near the faucet 3 to prevent cold air from flowing into the groove 8a and impairing the heat retention effect.
is installed.

The prevention of freezing of the water supply according to this embodiment is generally performed by the above-mentioned configuration, but if the branch pipe 2 nevertheless freezes, the ice can be thawed as follows.

That is, the cap 9 attached near the faucet 3 may be removed, and hot water heated in a kettle or the like may be poured into the groove 8a from the inlet of the heat-retaining tube 5. Then, since the hot water flows through the groove 8a while contacting the branch pipe 2, the temperature of the branch pipe 2 rises and the ice is thawed. In addition, the hot water will continue to seep into the ground.
Further, instead of hot water, it is also possible to blow warm air into the groove 8a using a blower or the like to melt the ice.

Next, the structure of each part of this embodiment will be explained in more detail with reference to the drawings.

FIG. 2 shows the cross-sectional shape of the heat-retaining tube 5 attached to the straight portion of the branch tube 2 along the - plane in FIG. A heat insulating material 8 is bonded and interposed on the inner surface of the outer skin 7, and a cut 8b is provided in a part of the heat insulating material 8. When attaching the heat insulating tube 5 to the branch pipe 2, the heat insulating material is spread out from the cut 8b, and then the adhesive surface 7a of the outer skin 7, which has been coated with adhesive in advance, is bonded together.

The material for the outer skin 7 may be, for example, a vinyl chloride sheet, and the material for the heat insulating material 8 may be foam polyethylene, but of course, other materials with low water absorption may be used in consideration of differences in climate conditions, price, etc. There is no problem. Further, in order to enhance the effect of preventing water absorption, it is also possible to coat the inner surface of the heat insulating material 8 and the grooves 8a with waterproof paint or the like. It should be noted that good results have been obtained with the A dimension and B dimension of the groove portion 8a each being about 10 mm.

3 and 4 show the cap 9 in its attached state. The cap 9 is split into two parts, and a flange 9a on the inner surface is engaged with a step 8c provided at the top of the heat insulating material 8. The counterbore-shaped space 8d formed by the stepped portion 8c is also
This has the effect of making it easier to pour hot water into the groove 8a using a kettle or the like. Further, the space portions 8d are provided at both ends of the heat-retaining tube 5, and have the effect of smoothing the flow of hot water.

That is, when joining the ends of two heat-retaining tubes 5 (or when one of them is the heat-retaining tube 6), each groove 8a is formed along the − plane in FIG. 2 as shown in FIG. (cross-sectional view), there may be cases where they are joined with their positions shifted from each other. Even in such a case, the hot water can smoothly flow into the lower groove 8a through the space 8d as shown by the arrow.

Depending on the circumstances at the time of installation, the part having this space 8d may be replaced with the C-C plane or D-D plane in FIG.
It is also possible to cut the heat insulating tube 10 at a surface and install it using a simple cylindrical heat retaining tube 10 which is a separate member as shown in FIG. Even in this case,
The same effect as shown in FIG. 5 can be performed, and the cap 9 can be attached to the heat-retaining tube 10 as shown in FIG.

7 to 9 show the structure of the heat-retaining tube 6 attached to the elbow portion of the branch tube 2. FIG. The heat-retaining tube 6 is split into two to facilitate attachment of the branch tube 2. The grooves 8a are formed in two places, upper and lower, because the position of the grooves used must be changed depending on the mounting condition of the heat-retaining tube 6.
For example, in the case of the installed state such as the heat retention tube 6 on the right side in FIG. 1, the lower groove 8a in FIG. 7 is used as a hot water flow path, and In such an attached state, the upper groove 8a in FIG. 7 will be used as a hot water flow path.

By the way, although it is not used in this embodiment, if there is a part in the middle of the branch pipe 2 that uses a T-shaped elbow, a heat-retaining pipe with the same structure as described above as shown in FIGS. 10 and 11 may be used. 11 may be used. In this case, as shown in FIG.
It is convenient to install the one with a in three places.

The present embodiment is constructed as described above, and it is possible to easily perform heat insulation even on the elbow portion of the branch pipe 2, which is difficult to perform. Then, as shown in Fig. 1, after attaching the heat-retaining pipes 5 and 6 to the branch pipe 2, by taping the heat-retaining pipes 5 and 6 with water pipe tape, the water pipe can be kept warm using this embodiment. Construction is complete.

In this embodiment, instead of the faucet 3 attached to the tip of the branch pipe 2 as shown in FIG. 1, a drain plug may be attached to the tip of the branch pipe 2. Further, it is preferable to tightly fill the vicinity of the lower end of the heat-retaining pipe 5 buried underground with gravel or the like in order to facilitate the penetration of hot water. If necessary, 12 pipes (for example, vinyl chloride pipes) can be used to protect the heat insulation pipe 5 buried underground to prevent the groove 8a from being crushed by soil pressure. good. It goes without saying that if the water pipes are installed at a location where freezing is not so severe, it is not necessary to bury the heat insulating pipes 5 to the vicinity of the main pipe 1, and it is sufficient to bury them only to a slight depth from the ground surface.

(Effect of the invention) The present invention is configured as described above,
This has the effect of effectively preventing water pipes from freezing, easily thawing the ice even if it freezes, and enabling easy attachment of the heat insulating member to the water pipes.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of this embodiment, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a cross-sectional view showing the cap installed state, and Fig. 4 is a cross-sectional view taken from Fig. 3 in the - direction. 5 is a cross-sectional view showing the structure of the joint of the heat-retaining tube, FIG. 6 is a partial cross-sectional view showing the joint of the heat-retaining tube as a separate member, and FIG.
The figure is a cross-sectional view from the - direction of Figure 8, showing the structure of a heat-retaining pipe attached to the elbow part of a water pipe.
Figure 8 is a side view of Figure 7 viewed from the - direction, Figure 9 is a sectional view of Figure 7 viewed from the - direction, and Figure 1
Fig. 0 is a fragmented cross-sectional view showing the structure of a heat-retaining pipe attached to a T-shaped elbow portion of a water pipe, and Fig. 11 is a side view thereof. 1... Main water pipe, 2... Branch pipe, 3... Faucet,
5... Heat retention tube, 6... Heat retention tube, 7... Outer skin, 8...
...Heat insulation material, 8a...Groove.

Claims (1)

[Claims] 1. The branch pipe leading from the main water supply pipe to the faucet or drain valve is equipped with a heat insulating pipe consisting of an outer skin and a heat insulating material interposed inside the outer skin with grooves for circulating hot fluid. Anti-freezing device for water supply.