JPH0535186Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a heat insulating cover for water pipes.

(Prior Art) Conventionally, various heat insulating covers for water pipes have been provided in order to prevent water pipes from freezing. For example, as shown in Japanese Patent Application Laid-open No. 159232/1983, grooves are formed on the inner surface of the heat insulating cover to allow the thermal fluid to pass through.
If the water supply freezes, some systems are designed to thaw the water by flowing hot water through the gutter.

(Problem that the invention aims to solve) However, if the heat insulating cover is simply provided with grooves, the hot water will pass through and flow out without being completely utilized for thawing, and the temperature of the hot water will be higher in the upstream side. There was a problem that it took a long time to thaw because only the downstream side was thawed quickly and the downstream side was difficult to thaw.

The present invention was made in view of such problems, and aims to provide a heat insulating cover for water pipes that can effectively utilize the heat of boiling water and can be thawed quickly.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a heat insulating cover for water pipes in which a case filled with a heat insulating material is formed into a half-cylindrical shape to cover the water pipes.
An inlet formed to be able to inject hot water into the gap formed between the water pipe, a hot water pool formed by enlarging a part of the gap below the inlet, and a hot water pool below the hot water pool. A seal part that prevents hot water from flowing down is provided.

(Function) According to the above configuration, when the water pipe is frozen, when hot water is injected from the injection port, the hot water flows down the gap between the heat insulating cover and the water pipe and thaws the frozen tap water inside the water pipe. let When the seal portion prevents the hot water from flowing down, the hot water collects in the hot water pool. As a result, even on the downstream side where the temperature of the hot water is low, the hot water with a large heat capacity accumulated in the hot water pool thaws the frozen tap water near the hot water pool using all the heat it possesses.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a water pipe 1 is branched from a water main pipe (not shown) buried underground, once raised outdoors, bent horizontally by an elbow 2, penetrated a wall 3, and led indoors. A bell 4 is connected to its tip.

This water pipe 1 has heat insulating covers 5, 6, 7,
Covered by 8 and 9.

Among these, the insulation covers 5, 6, and 7 are
The insulation cover 8 covers the rising part of the elbow 2.
It covers the horizontal part from 4 to 4. The length or number of the heat insulating covers 5 and 6 for the rising portions may be determined depending on the height of the rising portions, or they may be formed integrally.

As shown in FIGS. 2, 3, and 6, the heat insulating covers 5, 6, 7, and 8 are formed into half-cylindrical hollow cases 10a and 10b made of synthetic resin. The urethane resin 11 is injected into the inside of the cases 10a and 10b and foamed.

As shown in FIG. 3, among each pair of cases 10a and 10b, one case 10a has a plurality of fitting protrusions 12a protrudingly provided, and the other case 10b has a fitting hole that fits with the fitting protrusions 12a. 12b is provided, and the fitting protrusion 12a and the fitting hole 12b are fitted so as to sandwich the water pipe 1, and the joint is sealed with tape, adhesive, etc., or tied with a stainless steel ring, so that the water pipe 1 is covered. It's getting old. Alternatively, as shown in FIG. 4, the side edges of each pair of cases 10a and 10b are connected by a thin wall portion 13 to form an integral body, and the thin wall portion 13 is bent to form one case 10a and the other case. You may make it cover the water pipe 1 by matching 10b. Even in this case, a pair of cases 10a and 10b
Seal the seams with tape, etc.

Further, a recess 14a is formed at the upper end of the heat insulating cover 5, a convex part 14b is formed at the lower end, and the recess 14a is formed at the upper end.
4a is a convex portion 14b formed at the lower end of the heat insulating cover 5;
The protrusion 14b at the lower end is fitted into a recess 14a formed at the upper end of the heat insulating cover 6, and each seam is sealed with tape or the like.

The inner diameter of each of the heat insulating covers 5, 6, 7, 8 is the same as that of the water pipe 1 so that when the water pipe 1 is covered with the heat insulating covers 5, 6, 7, 8, there is a gap 15 between the water pipe 1 and the water pipe 1. It is formed slightly larger than the outer diameter. In addition, the inner diameters of the two intermediate portions of the heat insulating covers 5 and 6 are made large, so that hot water pools 16a and 16b are formed between the heat insulating covers 5 and 6 and the water pipes 1. Here, as shown in Fig. 2, either increase the outer diameter of that part by the increase in the inner diameter so that the insulation thickness of the urethane resin 11 does not decrease, or adjust it to the outer diameter of that part. It is preferable to form the whole straightly.

The heat insulating cover 7 covers the lowest part of the rising portion of the water pipe 1, and is partially buried underground. A fastener 17 is installed between this heat insulating cover 7 and the heat insulating cover 6 above it. This fastener 1
As shown in FIG. 5, like the heat insulating cover 7, the cover 7 is split in half, and after being attached so as to sandwich the water pipe 1, the seam is fixed with tape, adhesive, etc. . The lower end of this fastener 17 is screwed into the heat insulating bar 7, and the upper end is fitted into the heat insulating cover 6 and sealed with an O-ring 18. By tightening this fastener 17, the rubber ring 20 fitted into the recess 19 at the upper end of the heat insulation cover 7 is brought into pressure contact with the water pipe 1, so that the gap 15 formed between it and the water pipe 1 is closed. It's summery.

The heat insulating cover 8 covers the horizontal portion of the water pipe 1, and a portion of the tip thereof penetrates the wall 3. Although the penetrating portion of the wall 3 and the outside may be formed separately, the joint surfaces must be reliably sealed with an adhesive. wall 3
If it is not possible to penetrate the inside of the wall, the tip of the heat insulating cover 8 may be brought into contact with the wall 3 and sealed with tape or the like.

As shown in FIG. 6, an inlet 21 is vertically bored in the horizontal part of the heat insulating cover 8 so that hot water can be injected from the outside into the gap 15 formed between the cover 8 and the water pipe 1. It's summery. This injection port 21
is closed with a stopper 22. In addition, in order to prevent the hot water injected into the inlet 21 from flowing toward the drain 4, the inner diameter at the tip of the horizontal portion is formed to be approximately the same as the outer diameter of the water pipe 1, or A gasket or the like is used to prevent a gap from being formed between the water pipe 1 and the water pipe 1.

As shown in FIG. 7, the heat insulating cover 9 is formed of a pair of cases 10a and 10b filled with urethane resin 11 similarly to the heat insulating cover 5 and the like. Then, a housing portion 23 that almost matches the shape of the collar 4 is formed on the mating surfaces of the pair of cases 10a and 10b, and a plurality of fitting protrusions 12a are provided on one case 10a, and a plurality of fitting protrusions 12a are provided on the other case 10b. The bellows 4 is covered by forming a fitting hole 12b (see FIG. 3) that fits into the bellows 4, and fitting the fitting protrusion 12a and the fitting hole 12b so as to sandwich the whole bellows 4 from both sides. . Also,
As shown in FIG. 8, a groove 24 serving as a handle is formed on the outer surface of the heat insulating cover 9. As shown in FIG.

The water pipe 1 equipped with the heat insulating covers 5 to 9 having the above configuration is covered with urethane resin 11 with good heat retention, so even if the outside air falls below freezing, the tap water in the water pipe 1 will not freeze. It becomes difficult.

If it freezes, it can be thawed by removing the stopper 22 and injecting hot water into the injection port 21.

That is, the hot water injected from the injection port 21 is
Gap 15 between insulation cover 8, 5-7 and water pipe 1
While flowing down, the frozen tap water in the water pipe 1 is thawed and flows out into the ground from the lower end of the heat insulating cover 7.
At this time, since there is no gap between the tip of the heat insulating cover 8 and the water pipe 1, the flow of hot water from the inlet 21 toward the drain 4 is prevented, and the hot water does not flow indoors.

Next, when the fastener 17 is tightened, the rubber ring 20 is pressed against the water pipe 1, and the gap 1 with the water pipe 1 is
5 is blocked, the rubber ring 20 prevents the hot water from flowing down, and the poured hot water begins to accumulate in the hot water pools 16a, 16b and the gap 15. Since the hot water accumulated in the hot water pools 16a, 16b has a large heat capacity, the frozen tap water near the hot water pools 16a, 16b is quickly thawed even if it is on the downstream side where the temperature is low. Further, the hot water accumulated in the gap 15 thaws frozen tap water uniformly from the entire circumference.

After that, when the temperature of the boiling water drops after a certain period of time and the thawing ability is lost, the fastener 17 is loosened, a gap is created between the rubber ring 20 and the water pipe 1, and the hot water starts to flow again. and flows into the ground.
Then, newly pour hot water into the injection port 21 and repeat the above operation.

On the other hand, when the ring 4 is not in use, the entire ring 4 can be covered with the heat insulating cover 9.
It never freezes. Further, when using the collar 4, the heat insulating cover 9 can be easily removed using the groove 24 as a handle, so there is no problem in using it.

In the above embodiment, the rubber ring 20 that closes the gap 15 between the water pipe 1 and the water pipe 1 with the fastener 17 was used as a sealing part to prevent hot water from flowing down.
As shown in the figure, a protrusion 25 is provided on the inner surface of the heat insulating cover 6 that covers the lowest part of the rising part of the water pipe 1, and a part of the flowing hot water is dammed up, and the hot water temporarily accumulates in the hot water pools 16a and 16b. It may also be configured to accumulate in the gap 15.

In addition, cases 10a and 1 of each heat insulation cover 5 to 9
The heat insulating material filled in 0b is not limited to urethane resin, but may also be foamed polystyrene or the like.

(Effects of the invention) As is clear from the above explanation, according to the invention, the hot water injected from the injection port collects in the water reservoir, so that frozen tap water in the water pipes can be thawed efficiently and quickly. It has the effect of being able to

[Brief explanation of the drawing]

Fig. 1 is an elevational view of a water pipe equipped with a heat insulating cover according to the present invention, Fig. 2 is a partially cutaway view seen from the mating surface of the heat insulating cover, and Fig. 3 is a sectional view taken along the line I-I in Fig. 2. , FIG. 4 is a sectional view showing another embodiment of the heat insulating cover, FIG. 5 is a sectional view of the sealing part of the heat insulating cover,
Figure 6 is a partially cutaway view of the heat insulating cover for the elbow seen from the mating surface, Figure 7 is a partially cutaway view of the heat insulating cover for the collar seen from the mating face, and Figure 8 is an external view of the heat insulating cover attached to the collar. 9 are views showing other embodiments of the seal portion of the heat insulating cover as viewed from the mating surface. 1... Water pipe, 5, 6, 7, 8... Heat insulation cover, 10a, 10b... Case, 11... Urethane resin (insulation material), 15... Gap, 16a, 16
b... Hot water pool part, 20... Rubber ring (sealing part), 21... Inlet.

Claims (1)

[Scope of utility model registration request] A heat insulating cover for a water pipe in which a case filled with a heat insulating material is formed into a half-cylindrical shape to cover a water pipe, an inlet formed so that hot water can be injected into a gap formed between the case and the water pipe; A heat insulation for water pipes, comprising: a water pool formed by enlarging a part of the gap below the inlet; and a seal part below the water pool to prevent hot water from flowing down. cover.