JPH0341298A - Erection method of insulating material to piping section - Google Patents

Abstract

PURPOSE:To make it easy to erect insulation by spacedly arranging auxiliary rings having an internal diameter larger than that of a piping section, covering the auxiliary rings by a flexible tube from the outside, pouring foaming material in inside space, making it foam and forming insulation material. CONSTITUTION:On the exposed part of a straight pipe 2 between which and a marth 4, an insulation material 5 has already been formed, and the external peripheral surface of a bent pipe 1 connecting the exposed part, auxiliary rings 6 made of wood, resin, or metal are arranged in proper spacing relation and are covered by a flexible tube 7 from outside. In the next step, forming resin is poured in space between the flexible tube 7 and the surface of the pipes 1 and 2 and made to foam forming insulation material. Thus, erection of insula tion material can be performed easily and speedily.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for installing heat insulating material on piping sections of cold and hot water supply piping and water and sewage pipes (including industrial water and agricultural water) that are subjected to freezing reinforcement. .

Conventional technology Conventionally, as shown in Fig. 4, the method of applying heat insulating material to piping sections was to wrap rock wool 42 around the outer periphery of piping section 41 and then cover it with waterproof paper 43 and anticorrosion tape 44. .

However, in such a conventional example, there was a problem that heat retention was poor because it was difficult to bring the rock wool 42 into close contact with the piping portion 41 or the covering material.

Therefore, as shown in FIG.
A method is adopted in which a heat insulating material is formed around the outer periphery of the piping section 51 by fitting a material (made of wood, synthetic resin, tinplate, etc.) onto the outside and injecting foamed resin 53 into this waste mold 52 and foaming it. In Fig. 5, 54 is an injection port, 55 is an exhaust port, and 56 is a sealing material.

Problems to be Solved by the Invention Generally, when installing heat supply piping, installation of heat insulating material to irregularly shaped pipe parts such as joints and bent pipes requires on-site construction. The disposable mold has a complicated shape, increases the price, and requires troublesome work to fit it onto the piping, which poses problems in terms of delivery time.

The present invention provides a method for applying a heat insulating material to a piping part, which can be easily and inexpensively applied on-site, and also allows the thickness of the heat insulating material to be formed evenly and reliably, without reducing the heat retaining effect. The purpose is to

Means for Solving the Problems In order to solve the above problems, the configuration of the present invention is such that an auxiliary ring having an inner diameter larger than the outer diameter of the piping portion is spaced appropriately from the outer peripheral surface of the piping portion, and A plurality of tubes are arranged at appropriate intervals in the tube axis direction, and then the piping section is covered from the outside of the auxiliary ring with a visibility tube, and a foamed resin is placed between the flexible tube and the piping section. The material is injected and foamed to form a heat insulating material around the outer periphery of the piping section.

Effects According to the method for installing heat insulating material on piping sections, the piping section is covered with a visible tube, and foamed resin is injected and foamed between the visible tube and the outer circumferential surface of the piping section, so on-site construction is easy. Moreover, regardless of the shape of the irregularly shaped pipe, the visibility tube can be freely deformed and fitted into the piping part, making it possible to quickly form heat insulating material and making it possible to use it as a waste mold. Flexible tubes can also be constructed inexpensively.

Furthermore, when foaming resin is injected and foamed into the visibility tube and the outer peripheral surface of the piping part, the agent ring functions as a spacer around the entire circumference of the piping part, and therefore becomes flexible due to the weight of the foamed resin before hardening. The tube does not sag, and the foamed resin is reliably spread around the upper outer periphery of the piping section.

Furthermore, by reliably positioning the auxiliary ring with respect to the outer circumferential surface of the piping portion, a uniform heat insulating material can be easily formed.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 (aHb) is a cross-sectional view for explaining the method of applying heat insulating material to the piping section according to an embodiment of the present invention, and Figure 2 (a) (
b) is a partially cutaway front view and sectional view of an auxiliary ring used in the same method.

In FIG. 1(a), 1 is a bent pipe that connects straight pipes 2, and the insertion port and receiving port of the bent pipe 1 are the receiving port of one straight pipe 2 and the insertion port of the other straight pipe 2, respectively. and are connected by detachment prevention fittings 3, respectively. A heat insulating material 5 is already formed on the outer circumferential surface of the straight pipe 2 between it and the mold 4.

Reference numeral 6 denotes auxiliary rings attached to the exposed portion of the straight pipe 2 and the outer peripheral surface of the bent pipe 1 at appropriate intervals in the pipe axis direction.
and has an inner diameter larger than the outer diameter of the straight pipe 2, and is made of wood, synthetic resin, or metal. 7 is auxiliary ring 6
From external measurements, it is a visibility tube that covers the exposed parts of the bent pipe 1 and the straight pipe 2, and is made of, for example, a soft polyethylene resin with a thickness of 0.1 to 0.2 m. It acts as a spacer between the outer peripheral surfaces of the tube 1. Foamed resin 8 is injected into the space between the flexible tube 7 and the outer peripheral surface of the bent pipe 1, and as shown in FIG. 1(b),
The flexible tube 7 and the foamed resin 8 form the heat insulating material 9 that covers the exposed portions of the bent pipe 1 and the straight pipe 2.For example, the foamed resin 8 has the following formula: base material: hardening agent -1 = 1°20 times Use foamed polyurethane resin.

The auxiliary ring 6 is attached to the bent pipe l and the straight pipe 2 as shown in FIG.
A ring body 10 having an inner diameter larger than an outer diameter, and a plurality of bolt holes 1 provided at equal intervals around the circumference of the ring body 10.
1 and an arc-shaped gripping member 12 at the tip on the center side of the ring.
This grasping member 1 consists of a retaining bolt 13 pivotally mounted.
2 is pressed against the outer circumferential surface of the bent pipe 1 or the straight pipe 2 with the holding bolt 13 to position the ring body 10.
serves as a spacer.

Next, the construction order will be explained. First, fit the required number of auxiliary rings 6 and flexible tubes 7 into the bent pipe 1. Insert the bent pipe 1 into the straight pipe 2 and connect it using the detachment prevention fitting 3. The rings 6 are moved and placed at appropriate intervals on the exposed portions of the bent pipe 1 and the straight pipe 2, and the protruding length of the holding bolt 13 is adjusted so that the gripping member 12 attached to the tip of the holding bolt 13 is held on the outer peripheral surface of the pipe. Position it by applying it to the

At this time, the center of the ring body 10 is aligned with the tube axis, and the visibility tube 7 is stretched along the outer circumference of the ring body 10 to cover the entire length of the tube to form the heat insulating material. The foamed resin 8 is injected through an injection port provided at an appropriate location on the tube 7, and internal air is discharged through an exhaust port provided at an appropriate location on the visibility tube 3. At this time, the auxiliary ring 6 functions as a spacer and the flexible tube 7 does not sag due to the weight of the uncured foamed resin, so the heat insulating material 9 is formed to have a uniform thickness.

Further, the flexible tube 7 is left as it is after construction to exhibit its anti-corrosion and waterproof capabilities.

FIG. 3 shows the installation of heat insulating material to the T-shaped pipe in the pond example. In FIG. After fitting the T-shaped pipe 15 to the straight pipe 2, attach the auxiliary ring 6.
The following steps are shown in FIG. The same is true for .

Effects of the Invention As described above, according to the method for applying heat insulating material to piping sections of the present invention, the installation of FFL heat insulating material can be carried out easily and quickly on site, and the flexible tube can be freely deformed. This makes it easier to fit the flexible tube into the piping section.
Furthermore, it is easy and inexpensive to produce a flexible tube as a waste mold, which is advantageous in terms of delivery time and price.

Moreover, the auxiliary ring that functions as a spacer prevents the flexible tube from sagging due to the weight of the foamed resin before hardening.The auxiliary ring also makes it easy to center the flexible tube, creating a heat insulator with an even thickness. is obtained,
It does not reduce the heat retention effect.

[Brief explanation of drawings]

Figures 1 (a) and (b) are cross-sectional views illustrating a method of applying heat insulating material to piping sections according to an embodiment of the present invention, and Figures 2 (a) and (b) are
) is a partially cutaway front view and cross-sectional view of an auxiliary ring used in the same construction method, FIG. FIG. 5 is a cross-sectional view illustrating a conventional method of applying a heat insulating material to a piping section. 1... Bent pipe, 2... Straight pipe, 6... Auxiliary ring,
7... Flexible tube, 8... Foamed resin, 9...
Heat insulation material, 15...T-shaped tube, 16...visibility tube.

Claims (1)

[Scope of Claims] 1. A plurality of auxiliary rings having an inner diameter larger than the outer diameter of the piping portion are spaced at appropriate intervals on the outer peripheral surface of the piping portion, and a plurality of auxiliary rings are arranged at appropriate intervals in the axial direction of the piping portion, Next, the piping section is covered from the outside of the auxiliary ring with a flexible tube, and a foamed resin is injected and foamed between the flexible tube and the piping section to insulate the outer periphery of the piping section. A method for applying a heat insulating material to a piping section, the method comprising forming a heat insulating material to a piping section.