JP2923642B1 - Insulation pipe for water supply and connection method of the insulation pipe - Google Patents

Abstract

An object of the present invention is to reduce the labor and time required for this work by keeping only the joints of the pipes to keep the heat of the entire pipe laid above the ground.
If the tube freezes, make it easy to thaw. SOLUTION: A water pipe (7), a heat insulating layer (9) covering the water pipe (7), a protective pipe (8) covering the heat insulating layer (9), and a water pipe (7) are laid on the ground. A water heating pipe (6), which is composed of a heater (H) for heating and has a heat retaining function and a thawing function from the beginning, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measure against freezing of a water line above ground.

[0002]

2. Description of the Related Art Conventionally, as a countermeasure against freezing of the above-mentioned pipe, after the pipe work, the entire pipe is covered with a heat insulating material such as glass wool or urethane foam, and the heat insulating material is further covered with a stainless steel protective cover or the like. I was covering.

[0003]

The above-mentioned heat retaining method requires a great deal of labor and time for the operation, and when the tube is frozen, the protective cover and the heat insulating material are removed to expose the tube, and the tube is heated using a gas burner. There is a problem that it is necessary to perform a troublesome decompression work such as the above.

[0004] Accordingly, the present invention provides a heat insulation for a water supply in which the heat insulation of the entire pipeline is reduced only by the connection portion of the pipe, and the labor and time required for this operation are reduced, and when the pipe is frozen, it can be easily thawed. It is an object of the present invention to provide a pipe and a method for connecting the heat retaining pipe.

[0005]

According to a first aspect of the present invention, there is provided an insulated pipe for water supply comprising a water pipe, a heat insulating layer covering the water pipe, and a protective pipe covering the heat insulating layer. By using a water insulation pipe having the heat insulation function from the beginning as a laying pipe above the ground, heat insulation of the entire pipeline can be performed only at a connection portion of the pipe, thereby reducing labor and time required for this work. In order to easily heat and thaw the water pipe when the water pipe is frozen, a heater is incorporated in the heat retaining pipe in advance, and a thawing function is also provided from the beginning.

[0006] In the heat insulating pipe, the water pipes are connected to each other using a water pipe joint, the heaters are connected to each other, and then the protective pipes are connected to each other using a protective pipe joint. The connection can be made by filling and injecting the raw material for forming the heat insulating layer to form the heat insulating layer, thereby providing a heat insulating function and a defrosting function to the entire pipeline.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a piping diagram for water supply (water supply),
In the figure, (1) is a water-based underground pipe that is piped across the river (2) to connect and connect the underground water pipes (3A) and (3B) that are piped to both sides of the river (2). The both ends of this ground-laying pipeline (1) are connected to the ends of the underground pipelines (3A) and (3B) at the underground portions on both sides of the river (2). When the river is narrow, the ground line (1) is stretched from one side of the river (2) to the other side only by its own rigidity. When the river width is as large as several tens of meters, the ground line (1) is a bridge ( The river (2) is fixedly supported by a pipe support (not shown) on the lateral side of 4) and is stretched from one side to the other side of the river (2). A normal air valve (5) is installed in the middle of the long ground-laying pipe (1).

[0008] As a ground laying pipe constituting the ground laying pipe (1), a water insulation pipe (6) shown in FIGS. 2 and 3 is used. The heat retaining pipe (6) is a water pipe (7) which is a fixed length pipe (4 meters straight pipe) made of resin or metal, and a heat insulating (heat insulating) layer (a heat insulating layer) made of a heat insulating (heat insulating) material covering the water pipe (7). 9) and
Relatively thin resin protective tube (8) covering heat insulation layer (9)
And a heater (H) for heating the water pipe (7) is incorporated in advance, and both ends of the water pipe (7) and the heater (H) are protected with a protective pipe (8) and a heat insulating layer. It protrudes from both ends of (9) by a predetermined dimension.

In addition, as the heater (H), conductive wires (H1) and (H2) that generate heat when energized are used, and a heat insulating tube (6) is used.
Conductive wire (H1) of approximately the same length as the water pipe (7) per line
(H2) are incorporated. Two conductive wires (H1)
(H2) is in contact with or slightly separated from the outer surface of the water pipe (7) in a straight line from one end side to the other end side of the water pipe (7) so as to be substantially parallel to the pipe axis. It is stretched as close as possible. Electrical connection terminals (50) are attached to both ends of the conductive wires (H1) (H2). Conductive wire (H
1) (H2) is a covered wire obtained by covering a nickel wire (51) that generates resistance heat by energization with two inner and outer resin layers (52) and (53) having insulation and heat resistance as shown in FIG. The terminal (50) is attached to both ends of the nickel wire (51).

FIGS. 4 and 5 show an example of a method of manufacturing the heat insulating tube (6). First, two conductive wires (H1) and (H2) are used.
Is stretched on the outer surface of the water pipe (7) as described above, and an adhesive tape (54) having insulation is spirally formed on the outer surface of the water pipe (7) from above the conductive wires (H1) and (H2). The conductive wires (H1) and (H2) are stretched and fixed to the outer surface of the water pipe (7). The fixing of the conductive wires (H1) and (H2) is performed by using a heat insulating layer (9).
To the outer surface of the water pipe (7) covered with a protective pipe (8)
And conductive lines (H1) (H
Do not fix both ends of 2). Then, the water pipe (7) is inserted into the protection pipe (8) such that both ends of the water pipe (7) and the conductive wires (H1) (H2) protrude from the both ends of the protection pipe (8) by the same predetermined dimension. Insert and place. At this time, the bearing (10) is fitted and fixed in advance to the water pipe (7) so that the plurality of bearings (10) are inserted and arranged at equal intervals in the protective pipe (8). The bearing (10) has a boss (10A) having an inner hole (10a) having a shape through which the conductive wires (H1) and (H2) can pass together with the water pipe (7), and the inside of the protection pipe (8) is completely independent. Not be divided into multiple rooms
The boss (10A) includes a plurality of arms (10B) integrally extending at equal intervals in the radial direction from the outer surface of the boss (10A).
The boss (10A) is arranged on the axis of the protection tube (8) by the tip of B) abutting on the inner surface of the protection tube (8),
The water pipe (7) inserted into the boss (10A) together with the conductive wires (H1) and (H2) is inserted and supported on the axis of the protection pipe (8).

Next, similarly to the bearing (10), a plug (11) having an insertion hole (11A) having a shape through which the conductive wires (H1) and (H2) can pass through together with the water pipe (7) is provided with a protective tube (11). After fitting both ends of 8) and closing both ends of the protective tube (8), the holding band (12) is attached to both ends of the water pipe (7) projecting from the plug (11) with bolts and nuts (12A). Tighten and fix, stop the stoppers (11) and position the water pipe (7) in the axial direction, and make the water pipe (7) and the conductive wire (H1).
A cylindrical mold (13) having both ends closed is formed outside the middle part of the water pipe (7) except for both ends of (H2).

The stopper (11) has an insertion hole (11A) and a shaft hole (11B) on the outside thereof, and one stopper (11) has the shaft hole (11B) located below the insertion hole (11A). And the other stopper (11) is fitted in the shaft hole (11).
B) is fitted into the protective tube (8) so that the shaft hole (11B) is located above the insertion hole (11A), and the shaft hole (11B) located below the insertion hole (11A) is inserted into the mold (13). The shaft hole (11B) located above the insertion hole (11A) is used as an injection hole for forming material of the heat insulating layer (9), and the plug (11) and the bearing (10) at the deepest part when viewed from the injection hole (11B). ) Formwork room (13)
It is used as an air vent hole formed in the upper part on the deepest side of A). The bearing (1) located in front of the deepest mold room (13A)
0) and each mold chamber (1) between the plug (11) and the bearing (10).
3B) Air vent holes (14B) are provided at the upper surface position of the protection tube (8) corresponding to the uppermost part on the deepest side of (13C) (13D).
(14C) and (14D) are established. These air vents (1
4B), (14C) and (14D) may be opened in the protective tube (8) in advance, or may be opened in the protective tube (8) after the formation of the mold (13).

Next, a molding material for a heat-insulating (insulating) material made of cellular resin, which can be formed by foam molding, is filled into a mold (13) and injected to form a heat-insulating (insulating) layer (9). The material of the heat insulating material and the method of filling and injecting the molding material may be appropriately selected and adopted. For example, by using "Quicklight 2" manufactured by Inoac Corporation, the heat insulating material can be used. A heat insulation layer (9) made of a certain urethane foam can be formed. The spray gun (15A) filled with resin (A) and the aerosol can (15B) filled mainly with a foaming agent (B) are spray guns (Y) through a Y-shaped hose (16). 17)
A foam, which is a resin (A) to which a foaming agent (B) is added, is ejected from an ejection nozzle (17A) of a spray gun (17). When filling and injecting this foam into the mold (13), the jet nozzle (17A) was inserted from the injection hole (11B) to the deepest mold chamber (13A) at the bottom of the mold (13). Thereafter, the ejection of the foam is started, the ejection nozzle (17A) is pulled out while ejecting the foam, and the mold is checked while the foam is ejected from each air vent hole (11B) (14B) (14C) (14D). From the deepest form room (13A) of the form (13), each form room (13
B) Fill and inject foam into (13C) and (13D). Then, the foam filled and injected into the mold (13) is free-foamed and cured at room temperature without cracks or voids.
In addition, a heat insulating layer (9) made of urethane foam having a uniform foam density is formed.

Finally, while removing each holding band (12) and each plug (11), a cap is inserted into each of the air vent holes (14B), (14C), and (14D) opened in the protective tube (8) through, for example, a sealing material. Or a hole filling operation of pouring a molten resin of the same material as that of the protective tube (8) to finish the product of the heat insulating tube (6).

[0015] The above-mentioned manufacturing method is of course that the factory can manufacture the heat insulation pipe (6) even at the piping site of the ground laid pipe (1), that almost no new equipment investment is required, and that the protection pipe (8) is a mold. Frame (13) double as part, water pipe (7)
And that the heat insulating layer (9) has extremely high adhesion to the protective tube (8) and the conductive wires (H1) (H2);
That the heat insulation layer (9) can be properly formed by injection foaming without any gap even in a space having a shape change between the protective tube (8) and the protective tube (8);
The protective tube (8), the bearing (10) and the heat insulating layer (9), which are additional components other than the water pipe (7), are all made of resin, and the weight of the conductive wires (H1) (H2) is negligible. In addition, the weight of the heat retaining pipe (6) does not become too heavy, the heat retaining pipe (6) can be cut to any length if there is a cutting tool for the water flow pipe (7), and the bearing (10) is formed of a heat retaining layer. (9)
The heat insulation pipe (6) buried in the heat insulation pipe (6) remains and increases the strength of the heat insulation pipe (6). Due to deformation and tensile damage, it is difficult to form a gap between the water pipe (7) and the protective pipe (8) and the conductive wires (H1) (H2) and the heat insulating layer (9) to reduce the heat insulating effect. Both ends of the protective tube (9) retreat inside the both ends of the protective tube (8), and the heat insulating layer is not formed at both ends of the protective tube (8), which is a trace of an effective plug (11) fitted for a reason to be described later. This is effective because there is a part (18) that can be formed.

In addition to the above-mentioned manufacturing method, the heat retaining pipe (6) is formed (manufactured) separately from the water flowing pipe (7), the protective pipe (8) and the heat retaining layer (9), and then the water flowing pipe (7). A method of assembling a conductive wire (H1) (H2) on the outer surface or the inner surface of the heat insulating layer (9) by stretching and fitting these pipes (7), (8) and (9) to each other. In this method, it is preferable to provide the bearing (10) and the unformed portion (18) of the heat insulating layer in the product.

When the heat retaining pipe (6) is cut to an arbitrary length for use, the water retaining pipe (7) and the conductive wires (H1) (H
The water pipe (7), the protection pipe (8), the heat insulation layer (9), and the conductive wire (H1) so that both ends of the heat insulation pipe (8) project from the both ends of the heat insulation pipe (8) and the heat insulation layer (9) by a predetermined dimension. ) (H2) After cutting in a plane perpendicular to the pipe axis of the water pipe (7), the protection pipe (8) and the heat insulation layer (9) are further cut,
A method in which the cut surface of the heat insulating layer (9) is dug down so that both ends of the heat insulating layer (9) retreat inside from both ends of the protective tube (8), and the heat insulating layer unformed portion (18) is provided. Is preferred.

FIG. 6 shows a bend pipe which is an example of various bend pipes (6A) which are water heat insulation pipes other than straight pipes used for a bend section and a branch section of the above-ground pipe line (1). FIG. 7 shows a cheese tube which is an example of 6B).
These bent pipes (6A) and branch pipes (6B) have the same structure as the heat retaining pipe (6) which is a straight pipe, and the same reference numerals are given and the description of the structures is omitted. In addition, only in the case of the branch pipe (6B), three conductive wires (H1) and (H2) are used as heaters (H).
(H3), one of which is linearly extended from one end side of the main pipe side of the branch pipe (6B) to the other end side so as to be substantially parallel to the pipe axis of the main pipe side, and one is one of the main pipe sides. From the end to the branch with the branch pipe, extend linearly so as to be substantially parallel to the pipe axis on the main pipe side, bend it at a right angle at the branch, and connect the branch pipe to the end on the branch pipe side from the branch. Linearly extending so as to be substantially parallel to the pipe axis, and one linearly extending from the other end of the main pipe side to a branch portion with the branch pipe side so as to be substantially parallel to the pipe axis of the main pipe side, It is bent at a right angle at the branch portion and linearly extended from the branch portion to the end on the branch tube side so as to be substantially parallel to the pipe axis on the branch tube side.
Conductive wires (H1) (H2) (H
3) The two pipes are in contact with each other or slightly parallel to each other, and in contact with or as close as possible to the outer surfaces of the branch pipe (6B) on the main pipe side and the branch pipe side, they are stretched and fixed. The ends of the conductive lines (H1), (H2), and (H3) are projected two by two.

The manufacturing method of the bent pipe (6A) and the branch pipe (6B) is the same as that of the heat insulating pipe (6) which is a straight pipe.
1) A water pipe (7) in which (H2) and (H3) are stretched and fixed to the outer surface using an adhesive tape (54) can be inserted through the end of the protective pipe (8) and inserted into the pipe. A method for manufacturing a heat insulating pipe (6) can be adopted, but the method for which it cannot be used is, for example, a protective pipe (8) divided into two and a water pipe (7).
After assembling the protective tube (8) by fusion splicing outside the tube, the bent tube (6A) and the branch tube (6A) are formed by a method of forming the heat insulating layer (9) in the same manner as the heat insulating tube (6) which is a straight tube. 6B) can be produced.

The heat insulation pipes (6), (6A) and (6B) are brought to the piping site, and a socket-type sleeve-shaped resin or metal water pipe coupling (19) and a socket-type sleeve-shaped resin protection are provided. Using the pipe joint (20) and the connector (55) as an electric wire connecting member, the heat insulating pipes (6), (6A), (6)
B) are connected to each other in a state where the conductive wires (H1) and (H2) are connected to each other, a heat insulating layer (9A) made of a heat insulating material is formed at the connection portion, and a resin or metal water flow pipe (7) (19) is formed. )When,
A heat insulation layer (9) (9A) made of a heat insulation (heat insulation) material covering the water passage pipes (7) and (19), and a relatively thin resin protection pipe (8) covering the heat insulation layer (9) (9A). ) And (20), and constitutes a ground-laying pipe (1) in which a heater (H) for heating the water-flow pipes (7) and (19) is incorporated.

FIG. 8 shows a method of connecting the heat retaining tubes (6), (6A), (6B) and a method of keeping the temperature of the connection portion thereof. First, the two heat retaining tubes (6), (6A), (6B) to be connected are connected. A protection pipe joint (20) is fitted to the outer surface of one of the protection pipes (8). In this state, the water pipes (7) are connected to each other with the water pipe joint (1).
After the connection using (9), the conductive wires (H1) and the conductive wires (H2) are connected using the connector (55).
In order to easily connect the conductive lines (H1) and (H2) on the upper surface side of the water pipe connecting portion, the water pipe (7) is connected to the conductive wire (H).
1) It is preferable to connect the (H2) and the connector (55) in a state where they are located on the upper surface side of the water pipe (7) and the water pipe coupling (19). In order to prevent incorrect connection of the conductive lines (H1) and (H2), the conductive lines (H1) and (H2) are color-coded and the colors of the conductive lines (H1) and (H2) connected to the connection terminals of the connector (55). It is preferable to provide a display means such as a display. The water pipe (7) and the conductive wire (H1) (H
After the connection of 2), the connector (55) and the water pipe fitting (19)
Is fixed using an adhesive tape (54) on the upper part of the outer surface of the water pipe (7), and the connection ends of the unfixed conductive wires (H1) (H2) between the connector (55) and the heat insulating layer (9). It is fixed to the upper part of the outer surface of the connection end and the upper part of the outer surface of the water pipe joint (19) using an adhesive tape (54).

Next, the protection pipe joint (20), which has been fitted to one of the protection pipes (8), is slid to the water pipe connection portion, and the protection pipe (8) is used by using the protection pipe joint (20). )
By connecting them, the heat insulation tubes (6) (6A) (6
B) are connected in a state where the conductive wires (H1) and (H2) are connected to each other, and by this connection, both ends of the heat insulating layer (9) are formed outside the water pipe connecting portion which is the end of the unformed water pipe (7). Is closed to form a cylindrical mold (13E).

Next, a heat insulation (heat insulation) layer (9A) made of a heat insulation (heat insulation) material is formed at the connection between the heat insulation tubes (6), (6A) and (6B). The protective pipe joint (20) may be opened beforehand on both sides of the upper surface of the protective pipe joint (20), or may be formed after the mold (13E) is formed.
(6) (6A) from the injection hole (21) opened on both sides of the upper surface of the container and the injection hole (21) of the air vent hole (22)
The molding material of the heat insulating material of the same material as the heat insulating layer (9) of (6B) is filled and injected into the mold (13E), and as shown in FIGS. 9 and 10, the conductive wire (H1) ( A heat insulating layer (9A) made of a heat insulating material is formed between the water pipe connecting portion to which H2) is connected and fixed and the protective pipe connecting portion through which the water pipe connecting portion is inserted on the shaft core.

As a method of filling and injecting the molding material for the heat insulating layer (9A), an appropriate method may be appropriately selected and employed. For example, "Quicklight 2" manufactured by INOAC CORPORATION may be used. Thereby, a heat insulation layer (9A) made of urethane foam, which is a heat insulation (heat insulation) material of the same material as the heat insulation tubes (6), (6A) and (6B), can be formed. Also in this case, when filling and injecting the foam into the mold (13E), the foam is injected and filled from the bottom of the mold (13E), which is the deepest part when viewed from the injection hole (21), and the air vent hole (2) is formed.
After confirming that the foam is ejected from 2), the filling and injection are completed, and the foam filled and injected into the mold (13E) is free-foamed and hardened at room temperature without any cracks or voids, and has a foam density. Forms a heat insulating layer (9A) made of uniform urethane foam.

Finally, a cap is fitted to the injection hole (21) and the air vent hole (22) opened in the protection pipe joint (20), for example, via a sealing material, or the same material as that of the protection pipe joint (20). Perform hole filling work to pour molten resin.

The method of connecting the heat insulation pipes (6), (6A) and (6B) and the method of heat insulation at the connection portion are described below.
(6) (6A) (6)
B) The connection and heat insulation work can be easily performed, the protective pipe joint (20) also serves as the mold (13E), the water pipe (7), the water pipe joint (19), the protective pipe (8), and the protective pipe. Extremely high adhesion of the heat insulating layer (9A) to the joint (20), the conductive wires (H1) and (H2) and the connector (55), and connecting and fixing the conductive wires (H1) and (H2) to the upper outer surface Heat insulation pipe (6) connected between the connected water pipe connection part and the protection pipe connection part for inserting the water pipe connection part on the shaft core.
(6A) Even in the space where the shape of the heat insulating layer (9) changes between (6B) and (6), the heat insulating layer (9A) can be properly formed by injection foaming without any gap, and the heat insulating layer (9A) prevents leakage of the water pipe connection part. This is effective because it also serves as a sealing material to prevent water from flowing around the conductive wire connection part.

When the water pipe (7) of the heat retaining pipes (6), (6A) and (6B) is a metal pipe, a well-known metal fitting such as a screw-type socket-type pipe joint (not shown) is used. When (7) is a thermoplastic resin tube made of polyethylene or the like, as shown in FIG.
Further, the protective tube (8) is also a thermoplastic resin tube such as polyethylene, for example. As shown in FIG. 9, a resin protective tube joint (20) of the same material is used. The resin water pipe fitting (19) and the protection pipe fitting (20) can easily connect the heat retaining pipes (6), (6A) and (6B) with less labor and time, and can be used with the water pipe (7). In addition, an electrofusion joint is used to reliably seal the connection surface with the protection tube (8).

A resin-made water pipe joint (19) and a protective pipe joint (20), which are electrofusion joints, are shown in FIG.
As shown in FIG. 1, a nickel wire (23A) is covered with an insulating layer (23B) of a glass fiber braid, and further, the insulating layer (23
B) A conductive wire (23) covered with a resin layer (23C) of the same material as the pipes (7), (8), (3a) and (3b) to be connected above is folded in half and spirally wound on a cylindrical surface. , Resin layer (23
Tubes (7) and (8) for connecting the heating element (24), which is partially heated and melted (23D) to form a sleeve, by heating and melting (C).
(3a) Resin joint (19) (2) made of the same material as (3b)
No. 0) is embedded in the connection surface with the pipes (7) (8) (3a) (3b), and is provided on the end surface of the joint (19) (20) to provide the conductive wire (23) of the heating element (24). A power source (27) is connected to a connection terminal (25) connected to both ends of the joint through a fusion controller (26), and a heating element (24) of the joints (19) and (20) is energized with a predetermined amount of electricity for a predetermined time. By doing so, joints (19) (20) and pipes (7) (8) (3a)
The resin on the connection surface of (3b) is heated and melted, and the joint (1) is melted.
9) (20) and the pipes (7), (8), (3a) and (3b) are fused together, and the resin water pipes (7) are mutually connected, and the resin water pipe (7) and the resin ground pipe are buried. (3a) (3b) and the protective tube (8) made of resin are connected to each other.

A heating element (24) of a resin water pipe fitting (19) and a protection pipe fitting (20), which are electrofusion joints, are provided in advance by integral insertion at the time of forming the joint, or separately from the joint body. In some cases, it is used by being mounted in a heating element mounting groove provided in advance on the inner surface of the joint body at the time of connection.

Heat insulation pipes (6) (6A) (6B) connected to the ends of the resin or metal underground pipes (3a) (3b) at the ends of the underground pipes (3A) (3B) End (end)
And the protective pipe joint (20) and the underground pipe (3a) (3
b) or an insertion hole (28A) through which a water pipe (7) connected to the underground pipes (3a) and (3b) is inserted, and is fitted to the end of the protective pipe joint (20). The processing is performed using a protective pipe joint (20) for closing the end face and a resin end cap (28) of the same material. The processing method is shown in FIG. ) (3
b) Insert the end cap (28) into the through hole (28A).
And then connected to the underground pipes (3a) (3b) or these pipes (3a) (3b).
The protection pipe joint (20) is fitted to the outer surface of the protection pipe (8) of (6B). In this state, the underground pipes (3a) (3b) and the water pipe (7) are connected to a water pipe fitting (19) made of resin, which is an electrofusion joint, or a metal pipe fitting or a heat insulating pipe (6) (6A) ( In the case where the water pipe (7) of 6B) is made of resin and the underground pipes (3a) and (3b) are made of metal, one pipe connection part is an electrofusion joint and the other pipe connection part is a metal screw-in type. The connection is made using the joints configured in the pipe joints.

Next, an underground pipe (3a) (3b) or a heat insulating pipe (6) (6A) connected to this pipe (3a) (3b)
The protection pipe joint (20) previously fitted to the outer surface of the protection pipe (8) of (6B) was slid and moved to the connection between the underground pipes (3a) and (3b) and the water pipe (7). Thereafter, the end cap (28) previously fitted to the underground pipes (3a) (3b) is fitted to the end of the protective pipe joint (20),
A protection pipe joint (20) is connected to the end of the protection pipe (8) at the end of the ground-laying pipe (1), and the protection pipe joint (2) is connected.
By connecting the end cap (28) to the end of the underground pipe (3) at the end of the above-ground pipe (1).
a) Forming a cylindrical end mold (13F) having both ends closed outside the water pipe connection portion with (3b).

Next, as shown in FIG. 13 and FIG. 14, by using the same heat insulation method as that for connecting the heat insulation pipes (6), (6A) and (6B), the water pipes to the underground pipes (3a) and (3b) are provided. A terminal heat insulating layer (9B) made of a heat insulating (insulating) material is formed at the connection portion, and the water passage pipes (7) and (19) of the heat insulating section and the heat insulating layer (9).
(9A) (9B) is treated to be sealed in protective conduits (8) (20) closed at the ends with end caps (28).

The terminal thermal insulation layer (9B) is an underground pipe (3a)
In addition to molding at the connection end of (3b) and the water pipe (7), molding may be performed only on the outer surface of one water pipe (7) from the connection end.

Underground buried pipelines (3A) (3B), such as a connection end with an air valve (5) attached via a branch pipe (6B) which is a heat insulating pipe in the middle of the ground laid pipeline (1). The other end of the branch pipeline from the ground-laying pipeline (1) other than the connection end with the above is also treated in the above-described manner.

The heat insulating layer (9A) and the terminal heat insulating layer (9B) at the connecting portion of the heat insulating tubes (6), (6A) and (6B) are connected to the heat insulating layer (9) of the heat insulating tubes (6) (6A) and (6B). Because the connection end of the protective tube (6), (6A), (6B) has an unformed portion (18) at the end of the protective tube (8), the end of the protective tube (8) It is formed in a state where it is bitten into the inside, and the heat insulation layer (9) of the heat insulation pipes (6), (6A) and (6B), the heat insulation layer (9A) of the connection part, and the terminal heat insulation layer (9)
It is possible to prevent the occurrence of a gap or the like on the connection surface with B), and to fuse the protective tube (8) of the thermal insulation tubes (6), (6A) and (6B) and the protective tube joint (20) with the thermal insulation layer. Molding part (1
This is performed at the end of the protective tube (8) provided with 8), and thereafter, the heat insulating layer (9A) and the terminal heat insulating layer (9B) at the connecting portion of the heat insulating tubes (6), (6A) and (6B) are formed. Insulation tube (6)
(6A) (6B) Protection Tube (8) and Protection Tube Joint (20)
This is effective because it can prevent the heat insulation layer of the fused portion from being thermally damaged at the time of fusing.

When the above-mentioned ground-laid pipe (1) is processed at the end, the ends of the conductive wires (H1) and (H2) at that part are also processed simultaneously, and the end of one of the underground pipes (3B) is processed. End treatment of the conductive wires (H1) and (H2) at the ends of the heat insulation pipes (6) and (6A) connected to the underground pipe (3b), and a branch pipe as a heat insulation pipe connected to the air valve (5). Since the terminal processing of the conductive lines (H1) and (H3) at the end on the branch pipe side in (6B) is the same, the former processing will be described and the latter processing will be omitted.

Heat insulation pipes (6) (6A) connected to the underground pipe (3b) at the end of one of the underground pipes (3B)
As shown in FIG. 12, FIG. 13 and FIG. 16, the end of the conductive wire (H1) (H2) at the end of the end form is connected to the end mold after the connecting step of the underground pipe (3b) and the water pipe (7). Prior to the step of forming (13F), the end of the conductive wire (H1) and the end of the conductive wire (H2) are connected to each other on the upper surface side of the water pipe joint (19) using the connector (55A). (55A) is fixed to the upper part of the outer surface of the water pipe fitting (19) using an adhesive tape (54), and the unfixed conductive wires (H1) (H2) between the connector (55) and the heat insulating layer (9) are fixed. Connection end with water pipe (7)
Each of the heat insulation pipes (6), (6A), (6B), which is fixed to the upper portion of the outer surface of the connection end portion and the upper portion of the outer surface of the water pipe fitting (19) using an adhesive tape (54), and constitutes the above-ground pipe (1). ) Is performed to unify the conductive lines (H1), (H2), and (H3) into the ground-placed pipeline (1).

Processing of the conductive wires (H1) and (H2) at the end of the heat insulation pipes (6) and (6A) connected to the underground pipe (3a) at the end of the remaining underground pipe (3A). Fig. 12 and Fig. 1
As shown in FIG. 4 and FIG. 16, after the step of connecting the underground pipe (3a) and the water pipe (7), the ends of the conductive wires (H1) and (H2) incorporated in the heat insulation pipes (6) and (6A). One end of two conductive wires (H11) and (H22) separately prepared for power supply connection is connected to the upper surface side of the water pipe coupling (19) using the connector (55), and the connector (55) is connected to the water pipe coupling. (19)
Is fixed using an adhesive tape (54) on the upper part of the outer surface of the water pipe (7), and the connection ends of the unfixed conductive wires (H1) (H2) between the connector (55) and the heat insulating layer (9). It is fixed to the upper part of the outer surface of the connection end and the upper part of the outer surface of the water pipe joint (19) using an adhesive tape (54), and the connection end of the power supply conductive wires (H11) and (H22) to the connector (55). Adhesive tape (54) on top of outer surface of water pipe fitting (19)
And the power supply conductive line (H11) (H
22) into the insertion hole (2) of the end cap (28).
8A) through the conductive wire drawing hole (56)
A power supply connecting wire (H) is provided on the outer surface of the end cap (28).
11) End form (13F) with (H22) pulled out
From the step of forming the end heat insulation layer (9B),
Both ends of the conductive wires (H1), (H2), and (H3) unified in the above-mentioned ground-laying pipe line (1) through the above-described processing are connected to the ground-laying pipe via the power-supply-connecting conductive wires (H11) and (H22). Road (1)
Withdrawal from one end side of
At the same time as the filling operation of the injection hole (21) and the air vent hole (22) opened in the protective pipe joint (20) performed after the molding of B), the power supply conductive wires (H11) (H22) and the extraction hole ( 56) A hole filling operation is performed to fill the gap between them.

As described above, by processing the respective ends of the conductive lines (H1), (H2) and (H3) of the above-ground line (1), as shown in FIG. From one end to the other end, each of the heat insulating pipes (6) wired and connected in contact with the upper part of the outer surface of the water pipes (7) and (19) along the pipe axis of the water pipes (7) and (19). ) (6A) (6
B) and one of the conductive lines (H1) and (H3) and the water line (from the one end to the other end of the ground laid pipe (1)) substantially parallel to the conductive lines (H1) and (H3). 7) (19)
Each of the heat retaining pipes (6) (6A) that are connected to the water pipes (7) and (19) in a state of being in contact with the upper portion of the outer surface thereof along the pipe axis of the pipe.
The other conductive line (H2) of (6B) is connected and unified at one end of the above-ground conduit (1), and is connected to the other end of the above-ground conduit (1). The protective conduits (8) and (2) are connected via the power supply connecting wires (H11) and (H22).
0) and (28) are drawn out, whereby the conductive wires (H1) and (H2) of each of the heat insulating tubes (6), (6A) and (6B) are drawn.
(H3) is one in which the middle part is folded back at one end of the above-ground line (1), and both ends are drawn out of the protection line from the other end of the above-ground line (1). Conductive wire (H
1) Wiring is connected to (H2) (H3) (H11) (H22).

Then, as shown in FIG. 16, a connector box (57) is buried in the ground surface near one end of the above-ground pipe (1) from which the power supply connection conductive wires (H11) and (H22) are drawn out. A top cover (57A) is provided on the upper surface of a connector box (57) provided flush with the ground surface, and a connector (55) is provided inside the connector box (57).
B) is fixedly installed, and the ends of the power connection conductive wires (H11) and (H22) drawn out from one end of the above-ground pipe (1) are connected to the connector (55B) by wiring.

As described above, the heat insulating tubes (6) (6A) (6)
By constructing the ground-laying pipeline (1) using B), the water-flow pipelines (7) and (19) and the conductive lines (H1) (H
2) (H3) The whole heat insulation layer (9) (9A) (9B) made of heat insulation material can be kept warm (insulated) without interruption, and the water passages (7) and (19) can be hardly frozen. It is possible to prevent a decrease in the heating (thawing function) efficiency and disconnection (impossible to thaw) of the water flow conduits (7) and (19) of the conductive wires (H1) (H2) (H3) due to low temperature, and to prevent the water flow conduit and heat insulation. Layers (9) (9A) (9B) are protected by protective conduits (8) (20)
(28), and can be sealed in the water pipes (7) (19), the conductive wires (H1) (H2) (H3), and the heat insulation layers (9) (9).
A) (9B) is completely shut off from the outside air to enhance the durability (weather), heat insulation function and thawing function of the water conduits (7) (19) and the conductive wires (H1) (H2) (H3). It is possible to maintain the given durability, heat retention function and thawing function without deterioration over time, and to keep the appearance good, and to maintain the appearance without deterioration over time. Further, since the whole of the ground-laying pipe (1) needs to be kept only at the connecting portions and the ends of the heat keeping pipes (6) (6A) (6B), the labor and time required for this work can be reduced.

In addition, the water pipe (7) of the above-ground pipe (1)
When (19) is frozen, the defrost controller (58) is connected to the connector (55B) inside the connector box (57) via the connection cables (59A) (59B), and the defrost controller (58) is connected. ) Is connected to a power supply (61) such as a commercial power supply,
The unified conductive line (H1) (H
2) By controlling energization of (H3) via the thawing controller (58), the conductive lines (H1), (H2), (H3)
The water flowing pipes (7) and (19) can be heated and thawed by the heat generated from the water. Thus, ground-laying pipeline (1)
It can be easily thawed without touching the surface at all, and can be safely thawed from the ground.

The energization control of the thawing controller (58) is performed based on the outside air temperature detected by the temperature sensor (62) provided in the controller (58), and is controlled by the conductive line (H1).
(H2) and (H3), that is, control is performed to heat the water passages (7) and (19) to, for example, about 20 degrees Celsius. The heating temperature and the heating time can be appropriately adjusted and set to the optimum temperature in consideration of the outside air temperature, the frozen state, the thawing time, and the like. The thawing controller (58) is a fusion controller (26) for controlling the conduction to the conductive wire (23) constituting the heating element (24) of the water pipe fitting (19), which is an electrofusion fitting, and the protective pipe fitting (20). And the control contents are the same, and the only difference is whether the heating temperature and time, which are the control targets, are high or low and long or short, so that the fusion controller (26) is used as the thawing controller (58). Can also.

The thawing function of the above-mentioned laid pipe (1) was used when the water pipe (7) was frozen. During the severe cold season, a thawing controller (58) was permanently installed inside the connector box (57). When the outside air temperature falls below a predetermined temperature (for example, 1 degree Celsius), the conductive lines (H1), (H2), and (H3) of the above-ground pipe (1) are energized. Then, by performing energization control to keep the water pipe (7) at a predetermined temperature (for example, 2 degrees Celsius), it is possible to function as an antifreezing device. In addition, ground-laying pipeline (1)
By using a power source stored in a battery by a solar cell as a power source (61) for the defrosting function and the anti-freezing function, it is possible to contribute to energy saving and to be used in, for example, a mountain area where it is difficult to secure the power source.

The number of conductive wires serving as heaters (H) to be incorporated in the heat retaining tubes (6), (6A) and (6B) may be one or three or more, but the required thawing function is economically and easily performed. Two are preferable to obtain. From this, the conductive wire is 1
Parallel lines that can be handled in pairs may be used instead of those that are handled separately for each book. The conductive wire may be spirally wound around the outer surface of the water passages (7) and (19), but it is not necessary to heat and defrost the entire water passages (7) and (19). , Pipes through which water flows even a little (7) (19)
It is only necessary to secure the inside of the water passage, and it is preferable to linearly extend the outer surface of the water passages (7) and (19) for the above reason.

[0046]

As is apparent from the above embodiments, the present invention provides a water pipe (7) and a heat insulating layer (9) covering the water pipe (7).
And a protective tube (8) covering the heat insulating layer (9) and a water pipe (7).
And a heater (H) for heating the water supply pipe, the water pipe (6), (6A), (6B) is used as the above-ground pipe, thereby keeping the whole of the above-ground pipe (1) warm.
(6A) Only the connection of (6B) is required, the labor and time required for this work can be reduced, and when the water pipe (7) is frozen, the water pipe (7) can be easily heated and thawed.

[Brief description of the drawings]

Fig. 1 Piping diagram for water supply

FIG. 2 is a cross-sectional view of an insulated pipe for water supply.

FIG. 3 is a sectional view of an insulated pipe for water supply.

FIG. 4 is an explanatory view showing a method of manufacturing a water heating pipe.

FIG. 5 is an explanatory view showing a method of manufacturing a water heating pipe.

FIG. 6 is a cross-sectional view of another heat insulation pipe for water supply.

FIG. 7 is a sectional view of another heat insulation pipe for water supply.

FIG. 8 is an explanatory view showing a method of connecting a water heating pipe and a method of keeping a heat at a connection portion thereof.

FIG. 9 is a cross-sectional view of a connecting portion of a water-supply heat insulating pipe.

FIG. 10 is a cross-sectional view of a connection portion of a water-supply heat insulation pipe.

FIG. 11 is an explanatory view of a heating element of an electrofusion joint.

FIG. 12 is an explanatory diagram showing a terminal treatment method of a water-supply heat insulating tube.

FIG. 13 is a cross-sectional view of a terminal of a water heating pipe.

FIG. 14 is a cross-sectional view of the end of a water-supplying heat pipe.

FIG. 15 is an explanatory view of a conductive wire for thawing.

FIG. 16 is a wiring diagram of conductive lines for thawing.

[Explanation of symbols]

 (1) Ground line for water supply (3A) (3B) Underground line for water supply (6) (6A) (6B) Heat insulation pipe for water supply (7) Water pipe (8) Protection pipe (9) (9A) (9B) Thermal insulation layer (19) Water pipe fitting (20) Protection pipe fitting (24) Heating element (26) Fusion controller (28) End cap (H) Heater (H1) (H2) (H3) (H11) ( H22) Conductive wire (55) (55A) (55B) Connector (58) Defrost controller

Claims (6)

(57) [Claims] 1. A water passage pipe (7), a heater for heating insulation layer covering the water pipe (7) and (9), a protective tube covering the heat insulating layer (9) and (8), the water pipe (7) ( H) and provided with, water pipe
(7) and for water insulation pipe end, characterized in that projecting from the end portion of the heat insulating layer (9) and the protective tube (8) of the heater (H). 2. The left side between the water pipe (7) and the protection pipe (8).
The right ends are closed with a stopper (11) to form a mold (13).
At the same time, one plug (11) is used to
Insert the injection hole (11B) into the other stopper (11) with the air vent (1).
The water supply according to claim 1, wherein 1B) is formed.
For heat insulation tube. 3. A water pipe coupling (19) between water pipes (7 ).
, The step of connecting the heaters (H), and the step of connecting the water pipe (7) and the heater (H) , and then connecting the protection pipes (8) using the protection pipe joint (20). After the step of connecting the protection pipe (8) and the protection pipe joint (2).
0) Connection of water for insulated pipe according to claim 1 Symbol mounting and a heat insulating layer forming step of forming material to fill the injection of the internal thermal insulation layer (9). 4. A water pipe (7) and a water pipe joint (19);
Heat is generated at each connection between the protection tube (8) and the protection tube joint (20).
With the body (24) interposed, the water pipe (7), the joint (19) and
And the protective tube (8) and the joint (20) are fusion-fixed respectively.
4. The connection of the water insulation pipe according to claim 3, wherein
How to continue. 5. Two conductive wires which generate heat when energized
(H1) (H2) is stretched on the outer surface of the water pipe (7) to
(H) and the conductive lines (H1) (H
2) Water pipe fitting (19) Connector to be fixed to the outer surface
4. The connection according to claim 3, wherein the connection is established by (55).
How to connect the water insulation tube. 6. The heating element (24) is connected to one conductive wire (23).
And the middle part of the conductive wire (23) is connected to the tubes (7) and (8).
Turn it over at the end and join both ends of the conductive wire (23)
(19) (20) characterized by being drawn out from the end
The method for connecting a water heating pipe according to claim 4.