JP2022173850A - Piping unit, construction method for piping unit, electrothermal heater wire, and method of manufacturing piping unit - Google Patents

Abstract

To provide a piping unit that facilitates installation of piping provided with an electrothermal heater wire, a construction method for the piping unit, the electrothermal heater wire, and a method of manufacturing the piping unit.SOLUTION: A piping unit of the present invention comprises piping that has both ends provided with connecting portions for extending another piece of piping, respectively, and an electrothermal heater wire that is attached to the piping in a state in which a terminal for power supply connection is arranged on the one-end side of the piping and in which an electric power supply terminal for extension, capable of being connected to another electrothermal heater wire, is arranged on the other-end side of the piping.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a piping unit, a piping unit construction method, an electric heater wire, and a piping unit manufacturing method.

In some cases, a heat insulating material or an electric heater wire for anti-freezing is attached to the piping (see Patent Documents 1 to 3, for example).

Japanese Patent No. 5211039 Japanese Patent No. 6479042 JP-A-8-17553

When both the heat insulating material and the electric heater wire are attached to the pipe, the heat insulating material is attached to the outer peripheral surface of the pipe after the electric heater wire is attached to the pipe. Therefore, for example, in order to reduce the on-site work at the location where the piping is installed, when manufacturing a piping unit in which both the heat insulating material and the electric heater wire are attached to the piping in advance, each connected on-site It is necessary to connect the electric heater wire of the piping unit to the power supply installed near each piping unit.

However, there are cases where a power source is not installed at a location where the piping unit is installed. For example, electric heater wires for heating pipes are often installed in outdoor pipes that are likely to be exposed to the cold outside air in winter. In such outdoors, there are few power sources that are permanently installed.

Accordingly, an object of the present application is to provide a piping unit that facilitates installation of piping provided with an electric heater wire, a construction method for the piping unit, an electric heater wire, and a method for manufacturing the piping unit.

In order to solve the above problems, in the present invention, a power supply connection terminal is arranged on one end side of a pipe having a connection part for extending another pipe at both ends, and another electric heater wire can be connected. The electric heater wire is attached to the pipe with the power supply terminal for extension arranged at the other end of the pipe.

Specifically, the present invention relates to a piping unit, which includes a pipe having a connection portion for extending another pipe at both ends, a power supply connection terminal disposed on one end side of the pipe, and another electric heater wire. and an electric heater wire attached to the pipe with an extension feeding terminal connectable to the pipe arranged at the other end of the pipe.

In the piping unit described above, the electric heater wire attached to the piping has an extension power supply terminal in addition to the power connection terminal. While the power connection terminal is arranged at one end of the pipe, the power supply terminal for extension is arranged at the other end of the pipe. Therefore, when connecting the piping units, simply connecting the power connection terminal of one piping unit to the extension power supply terminal of the other piping unit completes the work of connecting the electric heater wire of each piping unit. can do. Therefore, with such a piping unit, even if there are a plurality of electric heater wires, it is not necessary to connect each electric heater wire to a power supply, and the installation work at the site is easy.

The power supply connection terminal may be the plug of the wiring plug-in connector, and the extension power supply terminal may be the plug receiver of the wiring plug-in connector. According to this, the power supply connection terminal of the electric heater wire can be connected to both the extension power supply terminal of another electric heater wire and the wiring plug-in connector installed on site.

Further, the electric heater wire may have a heat generating portion that generates heat with power from the power connection terminal and a power transmission portion that transmits the power from the power connection terminal to the extension power supply terminal. According to this, it is possible to heat the pipe with the heating unit and supply electric power with the power transmission unit.

Further, a heat insulating material that covers the pipe together with the electric heater wire may be further provided. According to this, the piping can be effectively heated by the electric heater wire.

Moreover, the present invention can also be understood from the aspect of the construction method. That is, the present invention provides, for example, a method of installing a piping unit, which includes an arrangement step of arranging a plurality of the above-mentioned piping units at a location where piping is installed, and a method of installing the piping of any one of the plurality of piping units. A pipe connection step of connecting a connection portion to a connection portion of a pipe of any other piping unit adjacent to any one of a plurality of piping units, and an electric heating provided by any one of the piping units. and an electric heater wire connection step of connecting the power supply connection terminal of the heater wire to the extension power supply terminal of the electric heater wire of any other piping unit. In this case, in the arranging step, a plurality of piping units may be arranged in series. In addition, it may further include a heat insulating material attaching step of covering the connecting portion between the pipes together with the connecting portion between the electric heater wires with a heat insulating material.

In addition, the present invention is an electric heater wire, which is capable of connecting a power supply connection terminal arranged on one end side of a pipe having a connection portion for extending another pipe at both ends, and another electric heater wire. and an extension feeding terminal arranged on the other end side of the pipe.

Further, the present invention is a method for manufacturing a piping unit, comprising a preparation step of preparing a pipe having connection portions for extending other pipes at both ends thereof, and disposing a power supply connection terminal at one end of the pipe. and an attaching step of attaching the electric heater wire to the pipe in a state where an extension feed terminal to which another electric heater wire can be connected is arranged on the other end side of the pipe.

With the piping unit, piping unit construction method, electric heater wire, and piping unit manufacturing method described above, it is possible to facilitate the installation of piping provided with an electric heater wire.

FIG. 1 is a diagram showing an electric heater wire according to an embodiment. FIG. 2 is a diagram showing an example of a method of manufacturing a piping unit. FIG. 3 is a diagram showing an example of a method of installing the piping unit. FIG. 4 is a diagram showing an example of a riser unit. FIG. 5 is a diagram showing an example of a building construction process. FIG. 6 is a diagram comparing installation locations of power supplies.

Embodiments of the present invention will be described below. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following aspects.

FIG. 1 is a diagram showing an electric heater wire according to an embodiment. The electric heater wire 1 is, as shown in FIG. side non-heat-generating portion 3, extension side non-heat-generating portion 4 extending from the other end, insertion plug 5 provided at the end of power source-side non-heat-generating portion 3, and extension side non-heat-generating portion 4 provided at the end. and a plug receptacle 6. The electric heater wire 1 is obtained by integrating these constituent elements into a single piece.

The heat generating portion 2 is an electric heater wire containing a heat generating resistor that generates heat when energized. The heat generating portion 2 is made of a flexible material. Therefore, the heat-generating portion 2 can be wrapped around an object to be heated.

The power source side non-heat generating portion 3 and the extension side non-heat generating portion 4 are electric wires obtained by covering two parallel conducting wires with an insulating material. The power source side non-heat generating portion 3 and the extension side non-heat generating portion 4 are made of flexible material. Therefore, the power source side non-heat generating portion 3 and the extension side non-heat generating portion 4 can be freely bent like a commercially available electric cable.

The insertion plug 5 is the insertion plug of the wiring insertion connector. In other words, the plug 5 is a plug that can be plugged into a so-called outlet. Therefore, the insertion plug 5 can be inserted into an outlet on the wall of the building or a plug receiver at the end of the extension cable, and functions as a power connection terminal.

The plug receptacle 6 is a plug receptacle for a wiring plug-in connector. In other words, the plug receiver 6 is a plug receiver for a plug that can be plugged into a socket. Therefore, the plug receiver 6 can be inserted with the insertion plug 5 and functions as an extension power supply terminal.

The electric heater wire 1 has the form as described above. For this reason, in the heat-generating portion 2, in addition to the heat-generating resistor, a power supply side non-heat-generating portion 3 and an extension side non-heat-generating portion 4 (these are examples of the "power transmission section" referred to in the present application) are built in. Two conductors for connecting the conductors and supplying power from the non-heat-generating portion 3 on the power supply side to the non-heat-generating portion 4 on the extension side are incorporated. By connecting the electric heater wires 1 in series, it can be used for heating a long article.

Application examples of the electric heater wire 1 will be described below. The application example shown below illustrates the case of application to heating of pipes installed in cold districts. FIG. 2 is a diagram showing an example of a method of manufacturing a piping unit. When manufacturing the piping unit U, first, the electric heater wire 1 is wound around the outer peripheral surface 12 of the piping 11 as shown in FIG. 2(A). Since the heat-generating portion 2 of the electric heater wire 1 generates heat, it is preferable to wind the electric heater wire 1 around the pipe 11 so that the heat-generating portion 2 is in close contact with the outer peripheral surface 12 . Moreover, it is preferable that the electric heater wire 1 has a uniform winding direction and a uniform winding interval so that the entire pipe 11 is generally heated uniformly.

After winding the electric heater wire 1 around the outer peripheral surface 12 of the pipe 11, as shown in FIG. The heat insulating material 14 is, for example, a heat insulating material such as glass wool having a large heat resistance value surrounded by a protective material such as a stainless steel plate or a galvalume plate. The heat insulating material 14 covers the main part of the pipe 11, but as shown in FIG. . Therefore, the piping unit U can be connected to another piping unit at the portion of the flange 13 exposed from the heat insulating material 14 even when the heat insulating material 14 is attached to the pipe 11 .

In addition, since the heat insulating material 14 is a heat insulating material that covers only the main part of the pipe 11, the insertion plug 5 and the plug receiver 6 of the electric heater wire 1 wound around the outer peripheral surface 12 are also exposed near the flange 13. ing. Therefore, even when the heat insulating material 14 is attached to the pipe 11, the piping unit U can be attached to the plug 5 and the plug receiver 6 near the flange 13 exposed from the heat insulating material 14. It can be connected to the electric heater wire 1 of U or a power source. The length of the electric heater wire 1 exposed from the heat insulating material 14 is longer than the length from the heat insulating material 14 to the flange 13 so that it can be connected to the electric heater wire 1 of another piping unit U. preferably longer. In addition, since the relative mounting angle between the pipes 11 around the central axis may change slightly during on-site installation work, the electric heater wire 1 should have a margin of length that allows for an angle error of at least about 20 degrees. It is preferable to ensure that If the length of the electric heater wire 1 exposed from the heat insulating material 14 is such a length, it can be connected to the electric heater wire 1 of another piping unit U at the flange 13, and the electric heating The length of the heater wire 1 is not excessively excessive. If the end of the electric heater wire 1 is the end portion to which the other electric heater wire 14 is not connected, a cover such as a resin cap that closes the hole of the plug receiver 6 may be attached.

3A and 3B are diagrams showing an example of a method for installing the piping unit U. FIG. A piping unit U manufactured in a factory or the like is carried to an installation site. Then, it is placed on a piping support or the like provided at the installation location, and arranged in series with another piping unit U (this is an example of the “arrangement step” referred to in the present application). When connecting the piping units U, as shown in FIG. 3A, the flanges 13 of the piping units U are butted against each other. A rubber gasket or the like is appropriately used between the flanges 13 . After the flanges 13 of each piping unit U are butted against each other, the flanges 13 are fastened with bolts and nuts as shown in FIG. The insertion plug 5 is inserted into the plug receptacle 6 (this is an example of the "electric heater wire connecting step" referred to in the present application). The insertion plug 5 and the plug receptacle 6 are preferably waterproofed with a self-adhesive tape or the like in order to prevent the electrodes from being submerged by condensed water or the like. After fastening the flanges 13 together with bolts and nuts and inserting the insertion plug 5 into the plug receptacle 6 to connect the electric heater wires 1 together, as shown in FIG. (This is an example of the “insulating material attaching step” referred to in the present application).

The piping unit U is applicable, for example, to construction sites of buildings. FIG. 4 is a diagram showing an example of a riser unit. At a building construction site, for example, a riser unit R as shown in FIG. 4 is used. A riser unit is a unit made up of a plurality of pipes extending vertically in a building, and is also called a vertical pipe unit, for example. The riser unit R is attached to a building structure constructed using a crane or the like. The riser unit R is a collection of plumbing for water supply and drainage and other materials (for example, communication cables, electric wires, etc.), and is arranged so as to extend in the vertical direction of the building. The piping unit U can be assembled to such a riser unit R. In such a riser unit R, high-temperature pipes and low-temperature pipes are located close to each other, so the above-described heat insulating material 14 or the like is appropriately used, or communication cables, electric wires, etc. are appropriately heat-resistant. is applied. Moreover, in such a riser unit R, in order to support cables with low tensile strength such as communication cables, the riser unit R is wound around or along the piping.

The piping units U are installed in the building in the following order. FIG. 5 is a diagram showing an example of a building construction process.

As shown in FIG. 5A, at a construction site of a building 21, a structure 22 is constructed using a crane C or the like. Then, as shown in FIG. 5B, the riser unit R is attached to the structure 22 in the process of constructing the structure 22 . Then, as the construction of the structure 22 using the crane C progresses, the construction of the structure 22 to which the riser unit R is attached is eventually completed as shown in FIG. 5(C).

At the construction site of such a building 21 , when connecting the piping units U of the riser units R, the flanges 13 are fastened with bolts and nuts, and the insertion plug 5 is inserted into the plug receiver 6 . Then, the connecting portion between the piping units U is covered with the heat insulating material 15 . As a result, the piping units U attached to the building 21 are connected to each other by the insertion plugs 5 and the plug receptacles 6 . Therefore, the electric heater wire 1 of each piping unit U can be supplied with electric power from other electric heater wires 1 connected to the power supply without being individually connected to the power supply. Therefore, the electric heater wire 1 of each piping unit U can supply electric power by inserting the plug 5 of the electric heater wire 1 closest to the power source in the circuit into a wiring plug connector such as an outlet. It can generate heat by receiving supply.

FIG. 6 is a diagram comparing installation locations of power supplies. FIG. 6A illustrates a case where a conventional electric heater wire 101 is attached to the outer peripheral surface 12 . Moreover, FIG. 6B illustrates a case where the electric heater wire 1 of the embodiment is attached to the outer peripheral surface 12 . In FIG. 6, illustration of the heat insulating material 14 and the heat insulating material 15 is omitted for easy understanding.

The electric heater wire 101 of the conventional example has an insertion plug 105 and does not have a plug receptacle 6 that the electric heater wire 1 of the embodiment has. Therefore, the electric heater wire 101 of the conventional example needs to be connected to the outlet P individually. Therefore, as shown in FIG. 6A, it is necessary to provide a large number of outlets P at the location where the pipe 11 is installed.

On the other hand, the electric heater wire 1 of the embodiment has a plug receptacle 6 for connecting an insertion plug 5 of another electric heater wire 1 . Therefore, the electric heater wire 1 can supply electric power to other electric heater wires 1 . Therefore, the electric heater wire 1 of the embodiment does not need to be connected to the outlet P individually. Therefore, as can be seen by comparing FIGS. 6A and 6B, the number of outlets P provided near the pipe 11 can be reduced.

In addition, the electric heater wire 1 described above can be modified as follows, for example.

The electric heater wires 1 may each have a thermostat for temperature control, for example. In this case, each electric heater wire 1 can perform autonomous automatic temperature control by on/off control.

Also, the electric heater wire 1 may have two or more plug receptacles 6 . In this case, even if the outer peripheral surface 12 branches into two or more paths, power can be supplied to the electric heater wire 1 of each path.

Further, in the above embodiment, the case where the piping unit U is provided in the building 21 was exemplified, but it is applicable to factories, hospitals, commercial facilities, plants, and various other structures. Further, in the above-described embodiment, the piping unit U is installed as a vertical pipe, but the piping unit U may be installed horizontally or obliquely.

U: Piping unit R: Riser unit C: Crane P: Outlet 1: Electric heater wire 2: Exothermic part 3: Non-exothermic part on power supply side 4: Non-exothermic part on extension side 5: Insertion Plug 6 Plug receiver 11 Piping 12 Outer peripheral surface 13 Flange 14 Insulating material 15 Insulating material 21 Building 22 Structure 101 Electric heater wire 105 Insertion plug

Claims (9)

a pipe having connections at both ends for extending other pipes;
an electric heater wire attached to the pipe with a power supply connection terminal arranged at one end of the pipe and an extension power supply terminal to which another electric heater wire can be connected is arranged at the other end of the pipe; have a
piping unit. The power supply connection terminal is a plug of a plug connector for wiring,
The power supply terminal for extension is a plug receiver of the plug-in connector for wiring,
The piping unit according to claim 1. The electric heater wire has a heat-generating portion that generates heat with power from the power connection terminal, and a power transmission portion that transmits the power from the power connection terminal to the extension power supply terminal.
The piping unit according to claim 1 or 2. Further comprising a heat insulating material covering the pipe together with the electric heater wire,
The piping unit according to any one of claims 1 to 3. An arrangement step of arranging a plurality of the piping units according to any one of claims 1 to 4 at an installation location of the piping;
Any one of the plurality of piping units has a connection portion of the piping that is included in any one of the plurality of piping units, and any other piping unit that is adjacent to the one of the plurality of piping units has the connecting portion of the piping. A pipe connection step of connecting to the connecting portion of the pipe;
An electric heater wire connecting step of connecting the power supply connection terminal of the electric heater wire of any one of the piping units to the power feeding terminal for extension of the electric heater wire of any one of the other piping units. and having
Construction method of piping unit. In the arranging step, the plurality of piping units are arranged in series,
The construction method of the piping unit according to claim 5. further comprising a heat insulating material attaching step of covering the connecting portion between the pipes together with the connecting portion between the electric heater wires with a heat insulating material;
The construction method of the piping unit according to claim 5 or 6. a power supply connection terminal arranged on one end side of a pipe having connection portions for extending other pipes at both ends;
an extension power supply terminal that can be connected to another electric heater wire and is arranged on the other end side of the pipe,
Electric heater wire. A preparation step of preparing a pipe having connection portions for extending other pipes at both ends;
a mounting step of attaching an electric heater wire to the pipe in a state that a power supply connection terminal is arranged on one end of the pipe and an extension power supply terminal to which another electric heater wire can be connected is arranged on the other end of the pipe; has
A method for manufacturing a piping unit.

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