JPH0545652Y2 - - 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, as shown in FIG. 7, a pipe branched from a main pipe (not shown) buried underground, rose above the ground, bent horizontally, penetrated a wall 30, and had a bell 1a attached to its tip. Insulating covers 31 to 34 are attached to water pipes exposed to the outside air, such as the attached water pipe 1, to prevent freezing. These heat insulating covers 31, 32, 33, and 34 have a half-cylindrical shape and cover the water pipe 1 between them, and their joints are fixed with a metal band or adhesive tape. ing. Also,
The uppermost heat insulating cover 31 is provided with a through hole 35 for injecting hot water into the gap between the water pipe 1 and the heat insulating covers 31 to 34. This through hole 35
is normally covered with a stopper 36.

(Problem to be solved by the invention) However, when using the conventional heat insulating covers 31 to 34 for a long time, the bottom heat insulating cover 3
Due to subsidence into the ground of No. 4, the axially adjacent heat insulating covers were displaced, creating a gap at the joint surface and impairing the heat insulating properties. In addition, in the case where adhesive tape is wrapped around the joint, when the water pipe 1 is thawed by flowing hot water from the through hole 35 into the gap between the water pipe 1 and the heat insulating covers 31 to 34, the adhesive tape becomes less effective due to the hot water. Because it ran out, I had to rewind it again.

The present invention was made in view of such problems, and an object of the present invention is to provide a heat insulating cover for water pipes that does not shift in the axial direction.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the first invention provides a halved cylindrical heat insulating cover for a water pipe that covers a water pipe, in which the joints of the heat insulating covers that are adjacent to each other in the axial direction are This band has a cutout hole, and is tightened so that the protrusion provided near the joint end surface of each heat insulation cover fits into the cutout hole.

In addition, the second invention provides a half-cylindrical heat insulating cover for a water pipe that covers a water pipe, in which a concave portion is formed on the joint end surface of one heat insulating cover adjacent to the axial direction, and a convex portion is formed on the joint end surface of the other heat insulating cover. At the same time, one of the concave portion and the convex portion is provided with an engagement protrusion projecting in a direction perpendicular to the water pipe, and the other is provided with an engagement hole into which the engagement protrusion fits.

(Function) According to the configuration according to the first invention, the protrusions of the heat insulating covers that are adjacent to each other are fitted into the notch holes of the band tightened to the joint, so that movement in the axial direction is restricted. .

Further, according to the configuration according to the second invention, the heat insulating covers that are adjacent to each other are restrained from moving in the axial direction because the engagement protrusion on one side and the engagement hole on the other side fit together at the joint part. .

Next, an embodiment of the present invention will be described with reference to the attached drawings.

Embodiment of the first invention In Fig. 1, 1 is a water pipe, 2a, 2b and 3
a and 3b are heat insulating covers, and 4 is a band.

The heat insulating covers 2a and 2b have the same shape and are formed in a half-tube shape to cover the water pipe 1, and as shown in FIG. 2, each is filled with urethane resin, etc. insulation material 6
is injected and foamed. A convex portion 8 is formed on the joint end surface 7 at the upper end of each heat insulating cover 2a, 2b, and a recess 10 is formed on the joint end surface 9 at the lower end. In addition, each heat insulation cover 2a,
An arc-shaped projection 1 is provided on the outer periphery of the joint end surfaces 7 and 9 of 2b.
1 and 12 are provided protrudingly. Furthermore, at one side end of the mating surface 13 of each heat insulation cover 2a, 2b,
A first protrusion 14 is provided, and a second protrusion 16 is provided at the other side end, which is bent into an L-shaped cross section and has a claw portion 15 at its tip. When the mating surfaces 13 of the left and right insulation covers 2a, 2b are brought together, the first protrusion 14 on one side engages with the claw part 15 of the second protrusion 16 on the other side, as shown in FIG. I'm starting to do that.

The heat insulating covers 3a and 3b are the heat insulating covers 2
It is arranged adjacent to a and 2b in the axial direction,
It has exactly the same configuration as the heat insulating covers 2a and 2b. The heat insulating covers 3a, 3b have recesses 10, 10 at the lower ends of the heat insulating covers 2a, 2.
It fits into the protrusions 8, 8 of b, and the protrusions 12,
12 is the protrusion 11, 1 of the heat insulating cover 2a, 2b.
1, and is connected to the heat insulating covers 2a, 2b.

The band 4 is made by bending a stainless steel band plate into a C-shape and bending both ends thereof outward. Notch holes 17, 17 are formed at positions facing each other in this band 4, and bolt insertion holes 18, 18 are formed at both ends.

The heat insulating covers 2a and 2b are configured such that, for example, the first protrusion 14 of the heat insulating cover 2a is connected to the second protrusion 14 of the heat insulating cover 2b.
After engaging the claw portion 15 of the protruding portion 16, when the mating surfaces 13, 13 of the two are brought together so as to sandwich the water pipe 1, the second protruding portion of the heat insulating cover 2a is elastically deformed, and the claw portion 15 of the heat insulating cover 2b, and are integrally assembled. The heat insulating covers 3a and 3b are also integrally combined in the same manner.

Then, the recess 1 at the lower end of the heat insulating covers 3a, 3b
After fitting the protrusions 8, 8 on the upper ends of the heat insulating covers 2a, 2b to the heat insulating covers 2a, 2b and joining the joint end surfaces 9, 7 of the two, the band 4 is attached to the joint, and the notch hole 17 is , 17 so that the protrusions 12, 12 on the lower ends of the heat insulating covers 3a, 3b and the protrusions 11, 11 on the upper ends of the heat insulating covers 2a, 2b fit into the holes 17, and tighten with bolts (not shown) inserted into the bolt insertion holes 18. .

As a result, the heat insulating covers 2a, 2b and the heat insulating covers 3a, 3b are restrained from moving in the axial direction, so that they will not shift and create gaps even after years of use.

From the water pipe 1 through the air layer in each gap between the insulation covers 2a and 2b and between the insulation covers 3a and 3b,
Since the flow of heat moving outward is blocked by the complicated gap structure formed by the engagement portion between the first protrusion 14 and the second protrusion 16, the heat insulation properties are not impaired. Furthermore, the joints between the heat insulating covers 2a, 2b and the heat insulating covers 3a, 3b have a complicated gap structure in which the convex part 8 and the concave part 10 fit together and the band 4 is attached. The insulation properties are not impaired.

When the water pipe 1 freezes, as shown in FIG. 3, the water pipe 1 and the heat insulating cover 2a,
Hot water is made to flow through the gap S between 2b, 3a, and 3b.

In addition, in the above embodiment, the heat insulation covers 2a, 2b
In order to integrate the heat insulating covers 3a and 3b, a first
Although the protruding part 14 and the second protruding part 16 are provided, the fourth protruding part 14 and the second protruding part 16 are provided.
As shown in the figure, a protrusion 19 and a groove 20 in which the protrusion 19 engages may be provided within the surfaces of the mating surfaces 13, 13. In addition, as shown in Fig. 5, the mating surface 1
One side end of 3 and 13 may be integrated via the thin part 21.

Embodiment of the second invention FIG. 6 shows heat insulation covers 22a, 2 according to the second invention.
2b, 23a, 23b, the protrusion 1 of the heat insulation cover 2a, 2b, 3a, 3b according to the first invention
1, 12 and the notch hole 17 of the band 4 are not provided, but instead an engagement protrusion 24 and an engagement hole 25 are provided.
It is substantially the same as a and 3b, and corresponding parts are given the same reference numerals and explanations are omitted.

That is, the engagement protrusion 24 is connected to the heat insulating cover 22
a, 22b and the heat insulating covers 23a, 23b on the outer circumferential surfaces of the convex portions 8 to protrude in a direction perpendicular to the water pipe 1. On the other hand, the engagement holes 25 are provided on the inner circumferential surface of the recessed portions 10 so that the water pipes 1 and It is formed at right angles. Then, by fitting the engagement protrusion 24 of the convex portion 8 at the upper end of the heat insulation covers 22a, 22b to the engagement hole 25 of the recess 10 at the lower end of the heat insulation covers 23a, 23b, the two are joined. There is.

By fitting the engagement protrusion 24 and the engagement hole 25,
Heat insulation covers 22a, 22b and heat insulation cover 23a,
23b, their axial movement is restrained and they will not shift.

(Effects of the invention) As is clear from the above explanation, according to the invention, adjacent insulating covers along a water pipe are restricted from moving relative to each other in the axial direction, and are prevented from shifting and creating gaps due to long-term use. Since there is no heat insulating property, it has the effect that the heat insulation properties are not impaired.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the heat insulating cover according to the first invention, Fig. 2 is a cross-sectional view of the heat insulating cover, Fig. 3 is a partially enlarged view of Fig. 2, and Figs. FIG. 6 is an exploded sectional view of a heat insulating cover according to the second embodiment of the present invention, and FIG. 7 is a diagram showing a state in which a conventional heat insulating cover is attached to a water pipe. 1... Water pipe, 2a, 2b, 3a, 3b... Heat insulation cover, 4... Band, 7, 9... Joint end surface,
11, 12...Protrusion, 17...Notch hole, 22
a, 22b, 23a, 23b...insulation cover, 2
4... Engaging protrusion, 25... Engaging hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a half-cylindrical heat insulating cover for water pipes that covers water pipes, each heat insulating cover is connected at the joint portion of the heat insulating covers adjacent to each other in the axial direction with a band having a cutout hole. A heat insulating cover for a water pipe, characterized in that the protrusion provided near the joint end face of the water pipe is tightened so as to fit into the notch hole. (2) In a half-cylindrical heat insulating cover for a water pipe that covers a water pipe, a concave portion is formed on the joint end surface of one of the axially adjacent heat insulating covers, a convex portion is formed on the joint end surface of the other heat insulating cover, and A heat insulating cover for a water pipe, characterized in that one of the concave portion and the convex portion is provided with an engagement protrusion projecting in a direction perpendicular to the water pipe, and the other is provided with an engagement hole into which the engagement protrusion fits.