JPH0322634Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a heat insulating material for pipes made of glass fiber for insulating cold water and cold air pipes, for example.

"Prior art and its problems" For example, in cold water and cold air pipes, the outer periphery of the pipe is coated with a heat insulating material made of glass fiber to achieve heat insulation. In this type of heat insulating material, the outer periphery of the glass fiber is often coated with a moisture-proof surface material in order to prevent the glass fiber from absorbing moisture and reducing its heat insulating performance.

That is, as shown in FIG. 3, a cover material 2 is coated on the outer periphery of a heat insulating material main body 1 made of glass fiber, which is formed into a cylindrical shape and has an inner periphery shape that matches the outer periphery of the pipe. In this case, the edge portion 2a of the outer covering material 2 is formed longer in the axial direction than the end surface 1a of the heat insulating material main body 1. This is thought to be because the outer surface of the main heat insulating material 1 made of glass fiber is completely covered with the outer covering material 2 to improve its appearance.

As shown in FIG. 4, this heat insulating material is installed so as to cover the outer periphery of the pipe 3. In this case, since the heat insulating material is formed to have a predetermined length in the axial direction, a plurality of heat insulating materials are connected along the axial direction of the pipe 3 so as to cover the entire pipe 3. A tape 4 made of the same material as the covering material 2 is wrapped around the outer periphery of the connecting portion of the heat insulating material.

However, as described above, since the edge 2a of the outer covering 2 protrudes longer than the end surface 1a of the heat insulating material body 1, the edge 2a of the outer covering 2 abuts against the connecting part of the heat insulating material. It is bent and protrudes from the outer periphery, or it is inserted into the joint surface. For this reason, a gap was created at the joint surface of the end face 1a of the heat insulating material main body 1, which became a thermal weakness (heat bridge), and the heat insulation performance was significantly reduced. In addition, due to the unevenness caused by the bending of the edge portion 2a of the surface material 2, the tape 4 cannot be applied properly.
Not only did the finished appearance deteriorate, but the moisture resistance against glass fibers also deteriorated.

"Purpose of the invention" The present invention was made in order to solve the problems of the prior art described above, and its purpose is to ensure that the end faces of the insulation material bodies are in close contact with each other at the connection part, so that the deterioration of the insulation property is prevented. To provide a heat insulating material for pipes which prevents moisture from being prevented, has a good finished appearance, and prevents deterioration of moisture resistance.

"Structure of the invention" The insulation material for pipes according to the invention has an inner peripheral shape that fits the outer periphery of the pipe, is made of glass fibers that can be opened and closed along the axial direction, and has a flat end face. and a moisture-proof surface material covering the outer periphery of the heat insulating material main body, and an edge portion of the surface material is shorter in the axial direction than an end surface of the heat insulating material main body.

Therefore, when connecting the heat insulating material, the surface material does not get in the way, and the end faces of the heat insulating material body can be brought into close contact with each other. In this case, since the edge of the outer covering material is shortened, a gap will be created between the outer covering materials, but this gap will be covered by the tape attached to the outer periphery of the connection part. Twisted and covered. When applying the tape, the edges of the outer covering material do not get in the way, so the tape can be applied neatly and tightly.

"Embodiment of the invention" As shown in FIG. 1, this heat insulating material 11 includes a heat insulating material body 12 made of glass fiber and formed into a cylindrical shape as a whole so as to have an inner circumferential shape that fits the outer circumference of a pipe. have Note that the end surface 12a of the heat insulating material main body 12 is a flat surface. In addition, the insulation material body 1
2 is divided into two along the axial direction so that it can be attached to the outer periphery of the tube, and can be opened and closed via a thin wall portion 13. Further, the outer periphery of the heat insulating material main body 12 is covered with a moisture-proof surface material 14. As the surface material 14, aluminum kraft paper, vinyl chloride film, glass fiber sandwiched between aluminum and kraft paper, etc. are used. The surface material 14 is adhered to the outer periphery of the heat insulating material body 12 using a rubber adhesive, a hot melt adhesive, an asphalt adhesive, or the like. Also, a double-sided adhesive tape 15 is placed on the inside of the seam of the surface material 14.
is provided. In this invention,
The edge portion 14a located in the axial direction of the surface material 14 is
It is made shorter than the end surface 12a of the heat insulating material main body 12, and the outer periphery of the end surface 12a of the heat insulating material main body 12 is exposed. The distance l between the edge portion 14a and the end surface 12a is 1 to 10 mm.
degree is preferred. Note that when joining the heat insulating material 11 in the axial direction, the tape 16 is wrapped around the outer periphery of the joint. The tape 16 is made of the same material as the surface material 14, and has an adhesive layer coated on its inner surface.

FIG. 2 shows the state in which this heat insulating material 11 is used. That is, the insulation material main body 12 is
3, and is attached to the outer periphery of the tube 3. Then, with the double-sided adhesive tape 15 shown in FIG.
The outer covering material 4 is joined into a cylindrical shape and the insulation material main body 12 is connected to the pipe 3.
be fixed to the outer periphery of the Furthermore, in order to completely cover the pipe 3 along the axial direction, a heat insulating material 11 is connected in the axial direction. In that case, the end surfaces 12a of the heat insulating material body 12 are brought into close contact with each other so that no gaps are formed. In the present invention, since the edge portion 14a of the outer covering material 14 is shortened, it does not become an obstacle when the end surface 12a of the heat insulating material body 12 is brought into close contact with the end surface 12a.
Further, an edge portion 14a of the outer covering material 14 is provided on the outer periphery of the joint portion.
The pair of heat insulating materials 11, 11 are joined by pasting the tape 16 so as to cover the.

In addition, in the above embodiment, the heat insulating material main body 12
Although the heat insulating material main body 12 is divided into two parts in the axial direction, the heat insulating material main body 12 may be divided into three parts in the axial direction when applied to a pipe with a large diameter.

Further, in the above embodiment, the heat insulating material 11 is
Although it has a cylindrical shape as a whole, it may have a rectangular cylindrical shape as a whole as long as the inner peripheral shape is compatible with the tube 3.

"Effects of the Invention" As explained above, according to the present invention, the joint surfaces of the edges of the heat insulating material body are brought into close contact with each other, so that there is no deterioration in the heat insulation performance at the joint. Furthermore, since the edges of the surface covering material do not abut each other, the tape can be applied neatly to the outer periphery of the joint, giving a good finished appearance and maintaining moisture resistance against glass fibers.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the pipe heat insulating material according to the present invention, Fig. 2 is a partial sectional view showing how the pipe heat insulating material is used, and Fig. 3 is a partial cross section showing an example of the conventional pipe heat insulating material. FIG. 4 is a partial sectional view showing the state in which the pipe heat insulating material is used. In the figure, 11 is a heat insulating material, 12 is a main body of the heat insulating material, 12
a is an end surface, 13 is a thin wall portion, 14 is a cover material, 14a
is the edge.

Claims (1)

[Scope of utility model registration request] The main body of the heat insulating material has an inner circumferential shape that matches the outer circumference of the pipe, and is made of glass fiber that can be opened and closed along the axial direction, and has a flat end surface. 1. A heat insulating material for a pipe, characterized in that an edge portion of the surface material is shorter in the axial direction than the end surface of the heat insulating material main body.