JP3251829B2 - Transmission line equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line device, and more particularly to cooling of the transmission line device.

[0002]

2. Description of the Related Art Due to an increase in demand for electric power in recent years, introduction of an ultra-high voltage or an ultra-ultra-high voltage into a city center has been attempted. There is an increasing number of cases in which a pipeline air transmission line is used. In addition, in order to improve the reliability of electric power transport, the number of cases in which two lines are laid, ie, two pipeline airborne transmission lines are laid in a sinus, and when one line fails, the other line transmits power is increasing. ing.

FIG. 15 is a conceptual diagram showing a conventional transmission line apparatus for cooling a pipeline air transmission line laid in a tunnel provided underground. A similar configuration is, for example,
No. 1408 of the Proceedings of the Annual Meeting of the Institute of Electrical Engineers of Japan. As shown in FIG. 15, one end of a pipeline air transmission line 2 laid along the longitudinal direction in a sinus 1 provided underground and having a length of, for example, about 3 km is provided. Overhead transmission line 4 via bushing 3 installed in
And the other end is connected to a switchgear 5 installed on the ground. Further, a cooling pipe 6 installed above the pipeline air transmission line 2 and through which cooling water flows flows back and forth in the cave 1 and is connected to a refrigerator 7. And this refrigerator 7 has a cooling tower 8
It is connected to the. Although one cooling pipe 6 is shown as reciprocating in the passageway 1, a plurality of actual cooling pipes 6 are provided.

FIG. 16 is a cross-sectional view of a conventional transmission line apparatus for cooling a three-phase separated pipeline air transmission line installed in a tunnel. In FIG. 16, a first cylindrical container 9 made of metal is arranged along the longitudinal direction in a sinus 1a.
a, Insulating gas is filled in the second cylindrical container 9b made of metal and the third cylindrical container 9c made of metal, and the first-phase conductor 10a and the second-phase Conductor 1
0b and the conduit air transmission line 2a accommodating the third conductor 10c are supported by the support metal 11a. A plurality of cooling pipes 6a are supported by a support (not shown), and are arranged above the inside of the sinus lane 1a along the longitudinal direction. 12a
Is a maintenance inspection space.

FIG. 17 is a cross-sectional view of a conventional transmission line apparatus for cooling a two-phase, three-phase separated type pipeline air transmission line installed in a tunnel. A similar configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-103404. In FIG. 17, a first cylindrical container 9d made of metal and a second cylindrical container 9e made of metal arranged along the longitudinal direction in the cave 1b.
And a third cylindrical container 9f made of metal, filled with an insulating gas, and the first phase conductor 10d, the second phase conductor 10e, and the third phase of the three-phase separated transmission line of the first circuit. Of the first line containing the conductor 10f
b is supported by the support metal 11b.

A fourth cylindrical container 9g made of metal and a fifth cylinder made of metal disposed along the longitudinal direction of the conduit 1b along the longitudinal direction thereof, facing the air transmission line 2b of the first line. Container 9h
And a sixth cylindrical container 9i made of metal, filled with an insulating gas, and the first-phase conductor 10g, the second-phase conductor 10h, and the third-phase conductor of the three-phase separated transmission line of the second circuit. Of the second line containing the conductor 10i
c is supported by the supporting metal 11c. A plurality of cooling pipes 6b are supported by a support (not shown), and are arranged above the inside of the sinus 1b along the longitudinal direction. 12b is a maintenance inspection space.

FIG. 18 is a cross-sectional view of a conventional transmission line device for cooling a one-line three-phase collective pipeline air transmission line laid in a tunnel. In FIG. 18, an insulating gas is filled in a cylindrical container 9j arranged along the longitudinal direction in a sinus 1c to form a three-phase conductor 10j of a three-phase batch transmission line.
Is supported by a support metal 11d. A plurality of cooling pipes 6c are supported by a support (not shown), and are arranged above the inside of the cave 1c along the longitudinal direction. 12c is a maintenance inspection space.

FIG. 19 is a cross-sectional view of a conventional transmission line apparatus for cooling a two-phase three-phase collective pipeline air transmission line laid in a tunnel. In FIG. 19, a first cylindrical container 9 made of metal is arranged along the longitudinal direction of the sinus 1d.
Ink, an insulative gas is sealed, and a three-phase conductor 10k of the three-phase batch transmission line of the first line is accommodated in the first line. The air transmission line 2e of the first line is supported by the support metal 11e. Have been. A second metal line disposed along the longitudinal direction of the conduit 1d along the longitudinal direction thereof in opposition to the air line 2e of the first line.
In the cylindrical container 9m, the insulating gas is sealed, and the three-phase conductor 10m of the second three-phase batch transmission line is accommodated. Supported. A plurality of cooling pipes 6d are supported by a support metal (not shown), and are disposed above and along the longitudinal direction of the cave 1d. 12d is a maintenance inspection space.

FIG. 16, FIG. 17, FIG. 18 and FIG.
As shown in FIG. 9, the size of each of the sinuses 1a, 1b, 1c, 1d is, for example, one of a plurality of cooling pipes 6a, 6b, 6c, 6d which require a plurality of pipes each having a diameter of 150 mm.
For example, cylindrical containers 9a, 9b, 9c, 9d, 9e, 9f, 9g, 9h, 9 having a tube diameter of 500 mm to 1000 mm.
i, 9j, 9k, 9m, supporting metals 11a, 11b, 11
It is necessary to have a size that can secure the installation space for c, 11d, 11e, and 11f, and the space for maintenance and inspection 12a, 12b, 12c, and 12d. In particular, a plurality of cooling pipes 6a, 6b, 6c, and 6d are installed. The size of the tunnels 1a, 1b, 1c, 1d changes depending on the space to be used.

Next, the operation will be described. Heat generated by energization of the pipeline air transmission line 2 (2a, 2b, 2c, 2d, 2e, 2f) is transmitted to the cylindrical containers 9a, 9b, 9c, 9
d, 9e, 9f, 9g, 9h, 9i, 9j, 9k, 9m
Is radiated from the surface of the cave, and the passage 1 (1a, 1b, 1c, 1)
The long cooling pipe 6 (6a, 6a) is mediated by the air in d).
(b, 6c, 6d). In this case, for example, the temperature of the cooling water is 20 ° C., the temperature of the air is 40 ° C., and the cylindrical containers 9a, 9b, 9c, 9d, 9
The surface temperature of e, 9f, 9g, 9h, 9i, 9j, 9k, 9m is designed to be 65 ° C. Then, the cooling water taking in the heat generated by the energization returns to the refrigerator 7 and is cooled, and the cooling pipe 6 (6a, 6b, 6
c, 6d). The heat taken by the refrigerator 7 is released from the cooling tower 8 to the atmosphere.

Since air is used as a medium for cooling, that is, heat exchange, the cooling water and the cylindrical containers 9a, 9
b, 9c, 9d, 9e, 9f, 9g, 9h, 9i, 9
Because a large temperature difference is required between j, 9k and 9m,
Use a large refrigerator 7 and a cooling pipe 6 (6a, 6b,
6c, 6d). In addition, in order to cope with thermal expansion and contraction due to a temperature change or ground displacement due to an earthquake, cylindrical containers 9a, 9b, 9c, 9d, 9e, 9f,
9g, 9h, 9i, 9j, 9k, 9m and cooling pipe 6
In (6a, 6b, 6c, 6d), a plurality of expansion joints (not shown) are provided in each longitudinal direction.

Also, unlike the above, the pipeline air transmission line 2
It is conceivable that the cooling pipe 6 is brought into direct contact with the cooling water. As an example in this case, FIG. 20 is a cross-sectional view showing a conventional power transmission line device disclosed in, for example, Japanese Patent Application Laid-Open No. 58-49020. In FIG. 20, an insulating gas is sealed in a metal cylindrical container 9n to form a three-phase conductor 10
The water jacket 13 has its base 13a welded to the upper portion of the cylindrical container 9n to the conduit air transmission line 2g containing n to form a water passage hole 13b. Cooling water is circulated through the water passage hole 13b formed in this way to cool heat generated by energization of the pipeline air transmission line 2g.

The pipeline air transmission line 2g is formed by welding a water jacket 13 to the upper part of the cylindrical container 9n to form a unit having a transportable length, transporting the unit to an installation location, and welding it on site to reduce the length. Is being scaled. In this field welding, the end of the cylindrical container 9n in which the insulating gas is sealed is welded in an airtight manner, and the end of the water jacket 13 for flowing the cooling water is welded in a watertight manner.

[0014]

In the conventional transmission line device as described above, the sinus 1 (1a, 1b, 1)
c, 1d), a long cooling pipe 6 (6a, 6b,
6c, 6d), the passageway 1 (1
a, 1b, 1c, 1d), and cools the air in the cylindrical containers 9a, 9b, 9c, 9 through the cooled air.
d, 9e, 9f, 9g, 9h, 9i, 9j, 9k, 9m
Is indirectly cooled, so that at the time of cooling, that is, heat exchange, the cooling water and the cylindrical containers 9a, 9b, 9c, 9d, 9e,
Since a large temperature difference is required between 9f, 9g, 9h, 9i, 9j, 9k, and 9m, a large-capacity cooling and a plurality of cooling pipes 6 (6a, 6b, 6c, 6d) are required. There was a point. Also, a unit in which the water jacket 13 is welded to the upper part of the cylindrical container 9n is installed at the installation location,
There is a problem that it is difficult to weld the end of the cylindrical container 9n and the end of the water jacket 13 simultaneously and airtightly and watertightly.

The present invention has been made to solve the above problems, and has as its object to provide a transmission line device capable of efficiently transmitting heat of a transmission line to a cooling pipe. . It is another object of the present invention to provide a power transmission line device that eliminates the need for manufacturing a unit for welding a water jacket to an upper portion of a power transmission line and can reduce difficult work in an installation location.

[0016]

In a transmission line apparatus according to the present invention, a metallic cylindrical container containing a power transmission conductor and filled with an insulating gas, and a cooling water disposed along the longitudinal direction of the cylindrical container. Outgoing water pipe, the return water pipe arranged along the longitudinal direction of the cylindrical vessel, and the cooling water flowing therethrough, and connected to both water pipes while being in contact with the cylindrical vessel and from the outward water pipe to the returning water pipe. A cooling pipe is provided for cooling the cylindrical container by flowing cooling water through the water pipe.

A first phase conductor for three-phase separated power transmission;
Metallic first cylindrical container, metallic second cylindrical container, metallic third cylindrical container, and cylindrical container each containing a second-phase conductor and a third-phase conductor and containing an insulating gas. Outgoing water pipes arranged along the longitudinal direction of the cooling water flow, return water water pipes arranged along the longitudinal direction of the cylindrical vessel and flowing the cooling water, as well as contacting along the cylindrical container and both water pipes A first connection is made to cool the first cylindrical container by flowing cooling water from the outward water pipe to the return water pipe.
, A second cooling tube for cooling the second cylindrical container, and a third cooling tube for cooling the third cylindrical container.

Further, a first metal conductor containing a first-phase conductor, a second-phase conductor and a third-phase conductor for three-phase separated power transmission of the first line and containing an insulating gas therein is provided. A cylindrical container, a metallic second cylindrical container, and a metallic third cylindrical container, which are disposed along the longitudinal direction opposite to the first line and the second line for three-phase separated type power transmission; A metallic fourth cylindrical container housing the one-phase conductor, the second-phase conductor, and the third-phase conductor and enclosing an insulating gas therein;
A cylindrical container and a metallic sixth cylindrical container, an outgoing water pipe arranged along the longitudinal direction of the line and through which cooling water flows,
A return water pipe that is arranged along the longitudinal direction of the line and through which cooling water flows, and is connected along both cylindrical containers and connected to both water pipes to flow cooling water from the outward water pipe to the return water pipe. A first cooling pipe for cooling the first cylindrical vessel, a second cooling pipe for cooling the second cylindrical vessel, a third cooling pipe for cooling the third cylindrical vessel, and cooling the fourth cylindrical vessel. A fourth cooling pipe for cooling the fifth cylindrical container, and a sixth cooling pipe for cooling the sixth cylindrical container.

Also, a metallic cylindrical container containing a three-phase conductor for three-phase batch power transmission and filled with an insulating gas, and an outgoing water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows. , A return water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows, and a cooling water flowing from the outward water pipe to the return water water pipe which is in contact with the cylindrical container and connected to both water pipes. A cooling pipe for cooling the cylindrical container is provided.

Also, a first cylindrical container made of metal, which contains a three-phase conductor for three-phase batch power transmission of the first line and insulates with an insulating gas, has a longitudinal direction opposed to the first cylindrical container. A metallic second cylindrical container, which is arranged along the direction and accommodates a three-phase conductor for three-phase batch transmission of the second line, and which is filled with an insulating gas, is disposed along the longitudinal direction of the cylindrical container. Outgoing water pipe through which cooling water flows, returning water pipe arranged along the longitudinal direction of the cylindrical vessel, and cooling water flowing therethrough, and outgoing water pipe connected along both cylindrical vessels and connected to both water pipes The first cooling pipe cools the first cylindrical vessel by flowing cooling water through the return water pipe, and the second cooling pipe cools the second cylindrical vessel.

The cooling pipe is connected to an outgoing water pipe to allow cooling water to flow in, and to contact and cool the cylindrical vessel along the cylindrical vessel of the first circuit and to the cylindrical vessel of the second circuit. The cylindrical container is arranged so as to cool the cylindrical container by contacting the cooling water along the outlet and to connect to the return water pipe to discharge the cooling water.

Further, a cylindrical container, a water pipe for the outward path, a water pipe for the return path, and a cooling pipe are arranged in a sinus.

Further, an expansion joint is arranged at a predetermined distance in the longitudinal direction of the cylindrical container, and a cooling pipe is arranged between adjacent expansion joints.

Also, in a cross section perpendicular to the axial direction of the cylindrical container, the angle formed by the line passing through the center point of the cylindrical container with the horizontal line passing through the center point of the cylindrical container in the upper half outer peripheral surface of the cylindrical container is 10 °. The center point of the cooling pipe is arranged at a position within an angle range of ゜ 60 °.

Further, a good heat conductive heat transfer seat is interposed between the cylindrical container and the cooling pipe.

Also, a second line transmission line, which is disposed along the longitudinal direction of the first line and the second line, and is disposed along the longitudinal direction of the first line. A water pipe for the outward path through which the cooling water flows, a water pipe for the return path that is arranged along the longitudinal direction of the transmission line and through which the cooling water flows,
And connected to the outgoing water pipe to allow the cooling water to flow in.
Cooling along the transmission line of the second line and cooling the transmission line, and cooling along the second line and cooling the transmission line and connecting to the return water pipe to allow cooling water to flow out It has a tube.

Still further, a good heat conductive heat transfer seat is interposed between the transmission line and the cooling pipe.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a conceptual view and a diagram of a transmission line apparatus for cooling a one-phase three-phase separated type pipeline air transmission line installed in an underground passageway showing a first embodiment of the present invention. 2 is a schematic plan view as viewed from A in FIG. 1, FIG. 3 is a cross-sectional view of a transmission line apparatus for cooling a one-line three-phase separated pipeline air transmission line laid in a sinus, and FIG. FIG. 4 is a plan view of the cave of FIG. 1, 2, 3 and 4, reference numeral 14a denotes a cave, which is provided in the ground and has a length of, for example, about 3 km. Reference numeral 15a denotes a conduit air transmission line, and a first cylindrical container 16a made of metal such as aluminum, a second cylindrical container 16b made of metal, and a metal In the third cylindrical container 16c, a first-phase conductor 17a, a second-phase conductor 17b, and a third-phase conductor 17b for three-phase separated power transmission are respectively provided.
The insulating gas is sealed in the phase conductor 17c. One end of the pipeline air transmission line 15a is connected to an overhead transmission line 19 via a bushing 18 installed on the ground, and the other end is connected to a switchgear 20 installed on the ground. In the present invention, the term “cave” includes an underground passage that passes through a transmission line such as a cable tunnel or a common ditch.

Reference numeral 21a denotes an expansion joint, which is a cylindrical container 16a, 1
For example, they are arranged at intervals of about 60 m along the longitudinal direction of 6b, 16c. The expansion joint 21a has a large expansion and contraction amount of, for example, ± 10 cm in order to cope with thermal expansion and contraction due to a temperature change or ground displacement due to an earthquake. Reference numeral 22a denotes a support metal that supports the cylindrical containers 16a, 16b, and 16c. 23a
Is a water supply pipe for the outward path through which the cooling water flows, which is disposed in the cave 14a along the longitudinal direction of the cylindrical container 16a, and one end thereof is connected to a cooling tower 24 described later installed on the ground. Numeral 24 denotes a cooling tower equipped with a pump (not shown), which takes in the heat of the pipeline air transmission line 15a, cools the cooling water flowing through a return water pipe 25a, which will be described later, and sends the cooled cooling water to the forward path. To the water supply pipe 23a.

Reference numeral 25a denotes a return water pipe through which cooling water flows. The return water pipe 25a is disposed in the canal 14a along the longitudinal direction of the cylindrical container 16a, and has one end connected to the cooling tower 24. The outgoing water pipe 23a and the returning water pipe 25a are connected by cooling pipes 26a, 26e, and 26g, which will be described later. The outgoing water pipe 23a is supported by the support 22b, and the return water pipe 25a is supported by the support 22c. Further, as shown in FIG. 2, the outgoing water pipe 23a and the returning water pipe 25a have the pipe diameters gradually reduced in order from the cooling tower 24 side, and the flow rate of the cooling water is substantially uniform in each part. I am trying to be. For example, stainless steel pipes for piping (JIS G
No. 3459) with a nominal diameter 250 (outer diameter 267.4 mm), followed by a nominal diameter 200 (outer diameter 216.3 mm) and a nominal diameter 15
0 (outer diameter 165.2 mm), nominal diameter 125 (outer diameter 13
9.8 mm), and the nominal diameter is 1 near the end.
The diameter of the tube is changed so as to be 00 (outer diameter 114.3 mm).

Reference numeral 26a denotes a first cooling pipe, which is made of, for example, the same material as that of the water pipe, and as shown in FIG.
1a, 21a, along the cylindrical container 16a, the cooling pipe 2
Almost half the length of 6a is folded back at the folded portion 26b, one is connected to the connecting portion 26c connected to the outgoing water pipe 23a, and the other is connected to the returning water pipe 25a. 26d. Reference numeral 26e denotes a second cooling pipe, which is similar to the first cooling pipe 26a.
a, 21a, the cooling pipe 26 along the cylindrical container 16b.
A length approximately equal to half of the length e is folded back at the folded portion 26f, one of which is connected to the connecting portion 26c connected to the outgoing water pipe 23a, and the other is connected to the returning water pipe 25a. 26d.

Reference numeral 26g denotes a third cooling pipe, and the first cooling pipe 2
Similarly to 6a, between the expansion joints 21a, 21a, along the cylindrical container 16c, approximately half the length of the cooling pipe 26g is folded back at the folded portion 26h, and one is connected to the outward water pipe 23a. The other end is connected to a connecting portion 26d connected to the return water pipe 25a. In order to adjust the flow rate of the cooling water flowing through the cooling pipes 26a, 26e, 26g, an orifice (not shown) is provided at the connection portion 26i connected to the outward water pipe 23a, and the size of the opening of the orifice is adjusted. It is done by changing.

With this configuration, the cooling water is supplied to the cylindrical containers 16a, 16b, and 16 as shown by arrows A, A, C, D, D, and C, respectively.
In order to cool c, it is circulated from the outward water pipe 23a to the return water pipe 25a. Also, the cooling pipes 26a,
When the cooling pipes 26a, 26e, and 26g need to be provided with expansion joints, the expansion joints 21a and 21g are arranged when the cooling pipes 26e, 26g are arranged across the expansion joints 21a.
a, the cooling pipes 26a, 26e, 2
It becomes unnecessary to provide an expansion joint for 6 g.

The cooling pipes 26a, 26e and 26g are arranged in the cylindrical containers 16a, 16b and 16c as shown in FIGS. 5 is a sectional view taken along line VV in FIG. 4, and FIG. 6 is a perspective view showing a main part of FIG. In FIGS. 5 and 6, a horizontal line H passing through a center point C of the cylindrical containers 16a, 16b, and 16c is positioned relative to the cylindrical containers 16a, 16c.
The cooling pipes 26a, 26c are located at positions where the angle θ between the lines passing through the center point C of the b, 16c is within the range of 10 ° to 60 °.
e, the center point S of 26g is arranged. And the cylindrical container 1
6a, 16b, 16c and cooling tubes 26a, 26e, 26g
Between the heat transfer seats 27 and the heat transfer seats 2
7 is divided in the longitudinal direction of the cylindrical containers 16a, 16b, 16c, and the heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical containers 16a, 16b, 16c with the mounting bracket 28.

The heat transfer seat portion includes cylindrical containers 16a, 16b,
16c and the cooling pipes 26a, 26e, 26g, in order from the outer peripheral surface of the cylindrical containers 16a, 16b, 16c.
(Room Temperature Vulcani
zed) First filler 27a made of rubber, cylindrical container 1
A heat transfer seat 27b made of the same material as that of 6a, 16b, 16c, for example, aluminum, and a second filler 27c made of RTV rubber or heat transfer grease. The heat transfer grease is obtained by mixing a metal oxide with a silicon oil as a base oil. The RTV rubber is also a silicon rubber-based material containing a metal oxide, and when filled with a liquid, cures at room temperature to become a rubber-like solid. Cylindrical container 16a, 1
6b, 16c and the cooling pipes 27a, 27e, 27g are in contact with each other in a circular shape, so that a gap is likely to be formed.
The heat transfer can be improved by reducing the formation of a gap at 27c. 29a is a maintenance inspection space.

Each of the cylindrical containers 16a,
An induced current flows through 16b and 16c when energized,
Approximately one third of the heat generated by each of the conductors 17a, 17b, 17c is dissipated by the respective cylindrical containers 16a, 16b, 1
6c. In addition, each conductor 17a, 1
7b and 17c generate heat in the respective cylindrical containers 16a and 1c.
The heat transfer to the cylindrical containers 16a, 16b, and 16c due to the convection of the insulating gas sealed in the insides 6b and 16c,
A relatively large amount is transferred by radiation. The heat generated by this radiation is applied to the cylindrical containers 16a, 16b, 16c and the conductors 17a, 17a.
Since the heat is transferred in proportion to the fourth power of the absolute temperature of b, 17c, as shown in FIG.
b, 16c, that is, the position angle θ of the cooling pipe is 90
° Cooling only in the vicinity is not enough.

However, the cylindrical containers 16a, 16b, 16c
Of the cylindrical container 16a, 1
A line D passing through the center point C of the cylindrical containers 16a, 16b, 16c with respect to a horizontal line H passing through the center point C of 6b, 16c.
When the center point S of the cooling pipes 26a, 26b, 26c is arranged at a position where the angle θ formed by the angle θ is in the range of 10 ° to 60 °, as shown in FIG. 16a, 16b, the difference of the temperature difference dT (K) between temperatures _{T 1} and the temperature _{T 2} of the lower part of the upper portion of the 16c of the cross-section is small, good cooling is performed becomes equality temperature distribution. Also,
A cooling pipe 26 is provided above the cylindrical containers 16a, 16b, 16c.
a, 26e and 26g can be prevented from traveling, and the space above the cylindrical container between the phases can be reduced.

In this configuration, the cooling water cooled by the cooling tower 24 and having a temperature of about 40 ° C. in summer is cooled from the outward water pipe 23a so as to cool the cylindrical vessels 16a, 16b and 16c. Through the pipes 26a, 26e and 26g, the water is circulated to the return water pipe 25a,
The temperature of the surfaces of a, 16b and 16c is about 65 ° C.
For this reason, while the cooling water cooled to about 20 ° C. by using the refrigerator 7 is used as in the prior art, in the present invention, the cooling water from the cooling tower 24 which reaches about 40 ° C. in summer is used. Water can be cooled, and the refrigerator 7 can be dispensed with. Further, unlike the related art, a plurality of cooling pipes 6a arranged along the longitudinal direction inside the sinus 1a become unnecessary, and the installation space for the plurality of cooling pipes 6a can be reduced.

Further, the cooling pipes 26a, 26e, 26
Since g is provided in contact with the cylindrical containers 16a, 16b, and 16c, it is not necessary to perform a difficult work of welding the water jacket 13 to the cylindrical container 9n in a gas-tight and water-tight manner as in the related art. FIG. 8 is a plan view of FIG. 3 with the sinus removed, and shows another example of FIG. Between the expansion joints 21a, 21a, cooling pipes 26j, 26k are connected from the outward water pipe 23a to the return water pipe 25a, respectively. The cooling pipes 26j and 26k are in contact along the cylindrical container. In this case, the same operation and effect as those in FIG.

Embodiment 2 Embodiment 2 of the present invention is a conceptual diagram of a transmission line device for cooling a two-phase three-phase separated pipeline air transmission line laid in an underground passageway provided in the ground according to the second embodiment. 1 is similar to FIG.
FIG. 9 is a cross-sectional view of a transmission line apparatus for cooling a two-phase three-phase separated pipeline air transmission line installed in an underground passageway according to a second embodiment of the present invention. 10 is FIG.
It is the top view which removed and removed the cave. 9 and 10, reference numeral 14b denotes a cave, which is provided in the ground and has a length of, for example, about 3 km. Reference numeral 15b denotes a pipeline air transmission line of the first line, a first cylindrical container 16d made of metal such as aluminum and a second cylindrical metal made of aluminum or the like disposed in the sinus 14b along its longitudinal direction. Container 16
e and a third cylindrical container 16f made of metal, the first-phase conductor 17d, the second-phase conductor 17e, and the third-phase conductor 17f of the three-phase separated transmission line are accommodated, and an insulating gas is supplied. It is sealed and supported by a support metal 22d.

Reference numeral 15c designates a pipeline air transmission line of the second line, which is a metal-made fourth cylindrical container 16 made of aluminum or the like disposed in the sinus 14b along its longitudinal direction.
g, metal fifth cylindrical container 16h and metal sixth container
, A first-phase conductor 17g, a second-phase conductor 17h, and a third-phase conductor 17i of the three-phase separated transmission line are accommodated in the cylindrical container 16i, and an insulating gas is sealed therein. Supported. And the pipeline air transmission line 1
One end of each of 5b and 15c is connected to an overhead power transmission line via a bushing installed on the ground as in FIG. 1, and the other end is connected to a switchgear installed on the ground.

Reference numeral 21b denotes an expansion joint, which is disposed at intervals of, for example, about 60 m along the longitudinal direction of each of the cylindrical containers 16d, 16e, and 16f. An expansion joint 21c is arranged at intervals of, for example, about 60 m along the longitudinal direction of each of the cylindrical containers 16g, 16h, and 16i. The expansion joints 21b and 21c are used to cope with thermal expansion and contraction due to temperature change or displacement of the ground due to an earthquake.
For example, a material having a large amount of expansion and contraction such as ± 10 cm is used.

An outgoing water pipe 23b through which the cooling water flows is disposed in the cave 14b along the longitudinal direction of the cylindrical container 16d, and one end is installed on the ground similarly to FIG. 1 of the first embodiment. Connected to the cooling tower. 25b is a return water pipe through which cooling water flows, which is disposed in the cave 14b along the longitudinal direction of the cylindrical container 16g, and one end of which is connected to the cooling tower. And the outgoing water pipe 23b and the returning water pipe 25b
Are cooling pipes 30a, 30d, 30e, 30f,
30h and 30i are connected. Outgoing water pipe 23b is supported by support 22f, and return water pipe 25b is supported by support 2
Supported at 2g. The outgoing water pipe 23a and the returning water pipe 25b have the pipe diameters gradually reduced in order from the cooling tower side in the same manner as in FIG. To make it almost uniform. 29b is a maintenance inspection space.

Numeral 30a denotes a first cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the two expansion joints 21b, 21b, along the cylindrical container 16d, FIGS.
Is arranged similarly to. That is, a line D passing through the center point C of the cylindrical container 16d with respect to a horizontal line H passing through the center point C of the cylindrical container 16d in the upper half outer peripheral surface portion of the cylindrical container 16d.
The center point S of the cooling pipe 30a is arranged at a position where the angle θ is in the range of an angle of 10 ° to 60 ° (reference numeral is shown in FIG. 5), and the heat transfer between the cylindrical vessel 16d and the cooling pipe 30a. Seat 2
7, the plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16d, and the heat transfer seats 27 having a length of, for example, several tens of cm are fixed to the cylindrical container 16d with mounting brackets. Connected to the connection part 30b connected to the water pipe 23b,
The other is connected to the folded part 30c.

Reference numeral 30d denotes a second cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the expansion joints 21b, 21b, along the cylindrical container 16e, FIGS.
Is arranged in the same way as. That is, a line D passing through the center point C of the cylindrical container 16e with respect to the horizontal line H passing through the center point C of the cylindrical container 16e in the upper half outer peripheral surface of the cylindrical container 16e.
The center point S of the cooling pipe 30d is arranged at a position where the angle θ is in the range of 10 ° to 60 °, and the cylindrical container 16e
The heat transfer seat 27 is in close contact with the cooling pipe 30d, and the plurality of heat transfer seats 27 are partitioned in the longitudinal direction of the cylindrical container 16e.
A heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16e with a mounting bracket, one of which is connected to the connection portion 30b which is connected to the outward water pipe 23b, and the other of which is the folded portion 30.
c.

Reference numeral 30e denotes a third cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the two expansion joints 21b, 21b, along the cylindrical container 16f, FIGS.
Is arranged in the same way as. That is, a line D passing through the center point C of the cylindrical container 16f is located on the upper half outer peripheral surface of the cylindrical container 16f with respect to a horizontal line H passing through the center point C of the cylindrical container 16f.
The center point S of the cooling pipe 30e is arranged at a position where the angle θ is within the range of 10 ° to 60 °, and the cylindrical container 16f
The heat transfer seat 27 is in close contact with the cooling pipe 30e, and the plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16f.
A heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16f with a mounting bracket, and one is connected to a connection portion 30b connected to the outward water pipe 23b, and the other is a folded portion 30.
c.

Reference numeral 30f denotes a fourth cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the two expansion joints 21c, 21c, along the cylindrical container 16g, FIGS.
Is arranged in the same way as. That is, a line D passing through the center point C of the cylindrical container 16g with respect to the horizontal line H passing through the center point C of the cylindrical container 16g in the upper half outer peripheral surface portion of the cylindrical container 16g.
The center point S of the cooling pipe 30f is arranged at a position where the angle θ is within the range of 10 ° to 60 °, and the cylindrical container 16g
The heat transfer seat 27 is in close contact with the cooling pipe 30f, and the plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16g.
A heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16g with a mounting bracket, and one is connected to a connection portion 30g connected to the return water pipe 25b, and the other is a folded portion 30.
c.

Reference numeral 30h denotes a fifth cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the expansion joints 21c, 21c, along the cylindrical container 16h, FIGS.
Is arranged in the same way as. That is, a line D passing through the center point C of the cylindrical container 16h with respect to a horizontal line H passing through the center point C of the cylindrical container 16h in the upper half outer peripheral surface portion of the cylindrical container 16h.
The center point S of the cooling pipe 30h is arranged at a position where the angle θ is within the range of 10 ° to 60 °, and the cylindrical container 16h
The heat transfer seat 27 is in close contact with the cooling pipe 30h, and the plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16h.
A heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16h with a mounting bracket, one of which is connected to a connection portion 30g connected to the return water pipe 25b, and the other is a folded portion 30.
c.

Reference numeral 30i denotes a sixth cooling pipe, which is shown in FIGS.
As shown in FIG. 5, between the expansion joints 21c, 21c, along the cylindrical container 16i, FIGS.
Is arranged in the same way as. That is, a line D passing through the center point C of the cylindrical container 16i with respect to a horizontal line H passing through the center point C of the cylindrical container 16i in the upper half outer peripheral surface portion of the cylindrical container 16i.
The center point S of the cooling pipe 30i is arranged at a position where the angle θ is within the range of 10 ° to 60 °, and the cylindrical container 16i
The heat transfer seat 27 is in close contact between the heat transfer seat 27 and the cooling pipe 30i, and the plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16i.
A heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16i with a mounting bracket, one of which is connected to a connection portion 30g connected to the return water pipe 25b, and the other is a folded portion 30.
c.

The cooling pipes 30a, 30d, 30e are
The cooling pipes 30f, 30h, and 30i have the same length. Further, the cooling pipes 30a, 30d, 30e, 3
In order to adjust the flow rate of the cooling water flowing through 0f, 30h, and 30i, the connecting portion 30b connected to the outgoing water pipe 23b is used.
This is accomplished by providing an orifice (not shown) and changing the size of the orifice opening. Note that the heat transfer seat portion is an RTV (Roo) as in the first embodiment.
m Temperature Vulcanized)
The first filler 27a is made of rubber, the heat transfer seat 27b is made of aluminum, and the second filler 27c is made of RTV rubber or heat transfer grease. Therefore, the heat transfer seat 27 and the cooling pipes 30a, 30d, 30e, 30
f, 30h, and 30i can be improved in adhesion, and good cooling characteristics can be obtained.

With this configuration, the cooling water is supplied to each of the cylindrical containers 16d, 16e, and 1 as shown by arrows K, C, C, C, and C in the drawing.
6f, 16g, 16h, and 16i are circulated from the outbound water pipe 23b to the inbound water pipe 25b so as to cool the outflow water pipe and the inbound water pipe for the first and second lines. Water pipe can be shared. Further, the cooling pipes 30a, 30
When d and 30e are arranged across the expansion joint 21b, or when the cooling pipes 30f, 30h and 30i are arranged across the expansion joint 21c, the cooling pipe 30
It is necessary to provide expansion joints at a, 30d, 30e, 30f, 30h, and 30i. However, the cooling pipes 30a,
30d and 30e are arranged between the expansion joints 21b and 21b, or the cooling pipes 30f, 30h and 30i.
Is disposed between the two expansion joints 21c, 21c, the cooling pipes 30a, 30d, 30e, 30f, 30h,
It becomes unnecessary to provide an expansion joint in 30i.

Each cylindrical container 16d of the three-phase separated transmission line has
An induced current flows through 16e, 16f, 16g, 16h, and 16i at the time of energization.
e, 17f, 17g, 17h, 17i
/ 3 of the heat generated in each of the cylindrical containers 16d, 16e, 16
f, 16g, 16h, and 16i. The conductors 17d, 17e, 17f, 17g, 17
h, 17i are generated by the respective cylindrical containers 16d, 16d.
e, 16f, 16g, 16h, and 16i, and cylindrical containers 16d, 16e, and 1 due to the convection of the insulating gas.
Radially more heat is transferred by radiation than by heat transfer to 6f, 16g, 16h, 16i. The heat due to this radiation is transferred to the cylindrical containers 16d, 16e, 16f, 16g, 16h, 16
i and conductors 17d, 17e, 17f, 17g, 17h, 1
Since heat is transferred in proportion to the difference of the absolute temperature of 7i to the fourth power,
As shown in FIG. 7 described above, the cylindrical containers 16d, 16e, 1
It is not sufficient to cool only the upper part of 6f, 16g, 16h, 16i, that is, the position angle θ of the cooling pipe near 90 °.

However, as described above, the cylindrical containers 16d, 1
6e, 16f, 16g, 16h, and 16i, and a horizontal line H passing through the center point C, the cylindrical containers 16d, 16e, 16
f, 16g, 16h, 16i, at an angle θ formed by a line D passing through the center point C within a range of 10 ° to 60 °,
Cooling pipes 30a, 30d, 30e, 30f, 30h, 30
When the center point S of i is arranged, the results of the experiment show that each of the cylindrical containers 16d, 16e, 16f, 16f
g, 16h, the difference between the temperature difference dT (K) between temperatures T ₁ and the temperature T ₂ of the lower portion of the upper cross section of the 16i is small, good cooling becomes equality temperature distribution is made. Further, cooling pipes 30a, 30d, 30e, 30f, 30 are provided above cylindrical containers 16d, 16e, 16f, 16g, 16h, 16i.
h, 30i can be prevented from traveling, and the space above the cylindrical container between the phases in each line can be reduced.

In this case, the cooling water cooled by the cooling tower and having a temperature of about 40 ° C. in summer is used for cooling the cylindrical vessels 16 d, 16 e, 16 f, 16 g, 16 h and 16 i so as to cool the cylindrical vessels 16 d, 16 e, 16 f, 16 g, 16 h and 16 i. From the water pipe 23b to the cooling pipe 30
a, 30d, 30e, 30f, 30h, 30i, and is circulated to the return water pipe 25b,
The temperatures of the surfaces of d, 16e, 16f, 16g, 16h and 16i are about 65 ° C. For this reason, while the cooling water cooled to about 20 ° C. by using the refrigerator 7 is used as in the prior art, in the present invention, the cooling water from the cooling tower 24 which reaches about 40 ° C. in summer is used. Cooling is possible even with water, and the refrigerator 7 can be dispensed with. In addition, a plurality of cooling pipes 6b disposed along the longitudinal direction of the inside of the cave 1b as in the related art are not required, and the plurality of cooling pipes 6b are not required.
The installation space for b can be reduced.

The cooling pipes 30a, 30d, 30e, 3
0f, 30h, 30i into cylindrical containers 16d, 16e, 16
f, 16g, 16h, and 16i, so that the water jacket 1 is attached to the cylindrical container 9n as in the related art.
3 can be made unnecessary in the field, a difficult work of air-tight and water-tight welding. Furthermore, cooling pipes 30a, 30
The cooling pipes d and 30e have the same length as the cooling pipes 30f, 30h and 30i and are connected by the folded portion 30c. That is, one cooling pipe is cooled at the same length over two lines. It is arranged to be. For this reason, the current flowing through the two lines by the same amount becomes one of the currents flowing through the other line until the other line stops due to an accident or the like.
Even if the current is doubled and the heat generation is quadrupled, it is not necessary to flow the cooling water at a flow rate four times the flow rate that has been used, and the cooling pipes 30a, 30d, 30e, 30f, and 3 are not required.
It is possible to sufficiently cool only by flowing a flow rate twice as long as the flow rate that has been flowing to 0h and 30i.

Embodiment 3 Embodiment 3 A conceptual diagram of a transmission line apparatus for cooling an air transmission line of one-phase three-phase batch type laid in an underground passageway according to Embodiment 3 of the present invention is shown in FIG. 1 is similar to FIG.
FIG. 11 is a cross-sectional view and a view of a transmission line device for cooling a one-line three-phase collective pipeline air transmission line installed in an underground passageway according to a third embodiment of the present invention. FIG. 12 is a plan view of FIG. FIG.
In FIG. 1 and FIG. 12, a cave 14c is provided underground and has a length of, for example, about 3 km. Reference numeral 15d denotes a pipeline air transmission line of the first line, which is a three-phase package type transmission line in a metal cylindrical container 16j made of aluminum or the like disposed along the longitudinal direction of the passage 14c. The phase conductor 17j is housed therein, filled with an insulating gas, and supported by a support 22h.

One end of the pipeline air transmission line 15d is connected to an overhead transmission line via a bushing installed on the ground, and the other end is connected to a switchgear installed on the ground.
An expansion joint 21d is disposed at intervals of, for example, about 60 m along the longitudinal direction of the cylindrical container 16j. The expansion joint 21d has a large amount of expansion and contraction, for example, ± 10 cm, in order to cope with thermal expansion and contraction due to temperature change or ground displacement due to an earthquake.
Reference numeral 23c denotes an outward water pipe through which cooling water flows, and
6j is disposed in the cave 14c along the longitudinal direction, and is connected at one end to a cooling tower installed on the ground, similarly to FIG. 1 of the first embodiment. Reference numeral 25c denotes a return water pipe through which the cooling water flows, and a cave 14c extends along the longitudinal direction of the cylindrical container 16j.
And one end is connected to the cooling tower.

The outgoing water pipe 23c and the returning water pipe 25c are connected by a cooling pipe 31a, which will be described later, and are supported by a support 22i. The outgoing water pipe 23c and the returning water pipe 25c have the pipe diameters gradually reduced in order from the cooling tower side in the same manner as in FIG. To make it almost uniform. 29c is a maintenance inspection space. Numeral 31a denotes a cooling pipe, as shown in FIGS.
In the meantime, along the cylindrical container 16j, approximately half the length of the cooling pipe 31a is folded back at the folded portion 31b,
One is connected to a connection part 31c connected to the outward water pipe 23c, and the other is connected to a connection part 31d connected to the return water pipe 25c.

The cooling pipe 31a is arranged in the same manner as in the first embodiment shown in FIGS. That is, the cylindrical container 16
The angle θ formed by a line D passing through the center point C of the cylindrical container 16j with respect to a horizontal line H passing through the center point C of the cylindrical container 16j in the upper half outer peripheral surface of the j is within an angle range of 10 ° to 60 °. In the position, the center point S of the cooling pipe 31a is arranged, and the heat transfer seat 27 is in close contact between the cylindrical container 16j and the cooling pipe 31a.
The plurality of heat transfer seats 27 are divided in the longitudinal direction of the cylindrical container 16j, and the heat transfer seats 27 having a length of, for example, several tens of cm are fixed to the cylindrical container 16j with mounting brackets. In order to adjust the flow rate of the cooling water flowing through the cooling pipe 31a, the outgoing water pipe 2
This is achieved by providing an orifice (not shown) in the connecting portion 31c connected to the orifice 3c and changing the size of the opening of the orifice.

The heat transfer seat portion is, as in the first embodiment, an RTV (Room Temperature V).
first filler made of rubber (ulcanized) rubber 27
a, heat transfer seat 27b made of aluminum, and RTV
Second filler material 27 made of rubber or heat transfer grease
c. Therefore, the heat transfer seat 27 and the cooling pipe 31a
And good cooling characteristics can be obtained. With this configuration, the cooling water is returned from the outward water pipe 23c so as to cool the cylindrical container 16j, as shown by arrows 矢 印, セ, タ, チ, 、. It is distributed to the water supply pipe 25c. Also,
When the cooling pipe 31a is arranged across the expansion joint 21d, it is necessary to provide the cooling pipe 31a with an expansion joint. However, the cooling pipe 31a is connected to both expansion joints 21d,
When the cooling pipe 31a is arranged between the cooling pipes 31d, it is not necessary to provide an expansion joint.

The three-phase batch power transmission cylindrical container 16j includes:
The induction current flows when the power is supplied, but the heat generated by the induction current is lower than in the case of three-phase separated power transmission because the three-phase vector sum can be ignored, but the relationship between the temperature of the cooling pipe and the surface temperature of the cylindrical container Is the same as in FIG. The heat generated by the three-phase conductors 17j is transmitted by radiation in a slightly larger amount than the heat transfer to the cylindrical container 16j due to the convection of the insulating gas sealed in the cylindrical container 16j. Since the heat due to the heat radiation is transferred in proportion to the fourth power of the absolute temperature of the cylindrical container 16j and the conductor 17j, as shown in FIG. However, cooling only at around 90 ° is insufficient.

However, as described above, with respect to the horizontal line H passing through the center point C of the cylindrical container 16j, the cylindrical container 1
The angle θ formed by the line D passing through the center point C of 6j is 10 ° to 6 °
The center point S of the cooling pipe 31a is located at a position within an angle range of 0 °.
, The experimental results show that, as shown in FIG.
The difference is small temperature difference dT (K) between temperatures T ₁ and the temperature T ₂ of the lower portion of the upper cross section of the cylindrical container 16j, good cooling is performed becomes equality temperature distribution. Further, it is possible to prevent the cooling pipe 31a from traveling to the upper part of the cylindrical container 16j.

In this case, the cooling water cooled by the cooling tower and having a temperature of about 40 ° C. in summer is cooled from the forward water pipe 23c through the cooling pipe 31a so as to cool the cylindrical container 16j. The temperature of the surface of the cylindrical container 16j is reduced to about 65 ° C. through the return water pipe 25c.
For this reason, while the cooling water cooled to about 20 ° C. by using the refrigerator 7 is used as in the prior art, in the present invention, the cooling water from the cooling tower 24 which reaches about 40 ° C. in summer is used. Cooling is possible even with water, and the refrigerator 7 can be dispensed with.

In addition, a plurality of cooling pipes 6c arranged in the longitudinal direction of the cave 1c as in the prior art are not required, and the space for installing the plurality of cooling pipes 6c can be reduced. Furthermore, the cooling pipe 31a is connected to the cylindrical container 1
Since the water jacket 13 is provided so as to be in contact with the cylindrical container 9n, it is not necessary to perform the difficult work of welding the water jacket 13 to the cylindrical container 9n in a gas-tight and water-tight manner.

Embodiment 4 Fourth Embodiment A conceptual diagram of a transmission line apparatus for cooling a two-phase three-phase collective pipeline air transmission line installed in an underground passageway according to a fourth embodiment of the present invention is shown in FIG. 1 is similar to FIG.
FIG. 13 is a cross-sectional view and a view of a transmission line apparatus for cooling a two-phase three-phase collective pipeline air transmission line installed in an underground passageway according to a fourth embodiment of the present invention. FIG. 14 is a plan view of FIG. 13 with the sinus removed. FIG.
In FIG. 3 and FIG. 14, reference numeral 14d denotes a cave, which is provided underground and has a length of, for example, about 3 km. Reference numeral 15e denotes a pipeline air transmission line of a first line, which is a three-phase package formed in a metal first cylindrical container 16k made of aluminum or the like which is disposed along a longitudinal direction of the conduit 14d. The three-phase conductor 17k of the transmission line is accommodated therein, filled with an insulating gas, and supported by a support 22j.

Reference numeral 15f denotes a second line pipeline air transmission line, which is a metal-made second cylindrical container 16m made of aluminum or the like disposed in the sinus 14d along its longitudinal direction.
Inside, the three-phase conductor 17m of the three-phase batch transmission line is accommodated, filled with an insulating gas, and supported by a support 22k. One end of each of the pipeline air transmission lines 15e and 15f is connected to an overhead transmission line via a bushing installed on the ground, and the other end is connected to a switchgear installed on the ground.

An expansion joint 21e is disposed at intervals of, for example, about 60 m along the longitudinal direction of the cylindrical container 16k. An expansion joint 21f is arranged at intervals of, for example, about 60 m along the longitudinal direction of the cylindrical container 16m. The expansion joints 21e and 21f have a large expansion and contraction amount of ± 10 cm, for example, in order to cope with thermal expansion and contraction due to temperature change or ground displacement due to an earthquake. Reference numeral 23d denotes an outward water pipe through which the cooling water flows.
And one end is connected to a cooling tower installed on the ground, similarly to FIG. 1 of the first embodiment. A return water pipe 25d through which the cooling water flows is disposed in the canal 14d along the longitudinal direction of the cylindrical container 16m, and one end is connected to the cooling tower.

The outgoing water pipe 23d and the returning water pipe 25d are connected by cooling pipes 31b and 31e to be described later. The outward water pipe 23d is supported by a support 22m, and the return water pipe 25d is supported by a support 22n. In addition,
The outgoing water pipe 23d and the return water pipe 25d have the pipe diameters gradually reduced in order from the cooling tower side in the same manner as in FIG. I try to be uniform. 29d is a maintenance inspection space.

A first cooling pipe 31b is provided between the expansion joints 21e, 21e along the cylindrical container 16k as shown in FIGS. 13 and 14 as in FIGS. 5 and 6 of the first embodiment. Placed in That is, with respect to the horizontal line H passing through the center point C of the cylindrical container 16k, the cylindrical container 1
The angle θ formed by the line D passing through the center point C of 6k is 10 ° to 6 °
The center point S of the cooling pipe 31b is located at a position within an angle range of 0 °.
Are arranged, and the heat transfer seats 27 are closely contacted between the cylindrical container 16k and the cooling pipe 31b.
k, a heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16k with a mounting bracket, and one is connected to a connection portion 31c connected to the outward water pipe 23d, and the other is connected to the connection portion 31c. It is connected to the folded part 31d.

A second cooling pipe 31e is provided between the expansion joints 21e, 21e and along the cylindrical container 16m as shown in FIGS. 13 and 14 as in FIGS. 5 and 6 of the first embodiment. Placed in That is, the cylindrical container 1 is positioned above the horizontal line H passing through the center point C of the cylindrical container 16m.
The angle θ formed by the line D passing through the center point C of 6 m is 10 ° to 6 °
The center point S of the cooling pipe 31e is located at a position within the range of the angle of 0 °.
Are arranged, and the heat transfer seat 27 is closely contacted between the cylindrical container 16m and the cooling pipe 31e.
m, a heat transfer seat 27 having a length of, for example, several tens of cm is fixed to the cylindrical container 16m with a mounting bracket, and one is connected to the connection portion 31f connected to the return water pipe 25d, and the other is connected to the connection portion 31f. It is connected to the folded part 31d.

The cooling pipe 31b has the same length as the cooling pipe 31e. The cooling pipes 31b,
In order to adjust the flow rate of the cooling water flowing through the outlet 31e, an orifice (not shown) is provided in the connecting portion 31c connected to the outward water pipe 23d, and the size of the opening of the orifice is changed. Note that the heat transfer seat portion is, similarly to the first embodiment, an RTV (Room Tempe).
first vulcanized rubber 27a, heat transfer seat 27 made of aluminum
b, and a second filler 27c made of RTV rubber or heat transfer grease. Therefore, heat transfer seat 2
7 and the cooling pipes 31b and 31e are improved in adhesion, and good cooling characteristics can be obtained.

With such a configuration, the cooling water cools the respective cylindrical containers 16k, 16m, as shown by arrows T, G, N, D, N, and N in the drawing. Since the water is distributed from the outward water pipe 23d to the return water pipe 25d, the outward water pipe and the return water pipe can be shared for the first line and the second line. Also,
When the cooling pipe 31b is arranged across the expansion joint 21e, or when the cooling pipe 31e is arranged across the expansion joint 21f, it is necessary to provide the cooling pipes 31b and 31e with expansion joints. However, the cooling pipe 31b
When it is arranged between the two expansion joints 21e, 21e, or when the cooling pipe 31e is arranged between the two expansion joints 21f, 21f, it is not necessary to provide an expansion joint for the cooling pipes 31b, 31e.

Each cylindrical container 16k, 1 for three-phase batch power transmission
At 6 m, the induced current flows when energized, but the heat generated by the induced current is lower than in the case of the three-phase separated transmission line because the vector sum of the three phases is almost negligible. The relationship with the temperature is the same as in FIG. The heat generated by the three-phase conductors 17k and 17m is transferred by radiation in a slightly larger amount than the heat transfer to the cylindrical containers 16k and 16m due to the convection of the insulating gas sealed in the cylindrical containers 16k and 16m. It is. Since the heat due to this radiation is transferred in proportion to the fourth power of the absolute temperature of the cylindrical containers 16k, 16m and the conductors 17k, 17m, as shown in FIG. Cooling only when the position angle θ of the cooling pipe is around 90 ° is insufficient.

However, as described above, the cylindrical containers 16k, 1
With respect to the horizontal line H passing through the center point C of 6 m, the cooling pipe is located above the horizontal line H passing through the center point C of the cylindrical containers 16 k and 16 m within the angle range of 10 ° to 60 °. 31b, when placing the center point S 31e, the result of the experiment, as shown in FIG. 7, the temperature difference dT between the respective cylindrical container 16k, the temperature of the top of the cross-section of 16m _{T 1} and the temperature _{T 2} of the lower
The difference in (K) is small, the temperature distribution becomes equalized, and good cooling is performed. In addition, it is possible to prevent the cooling pipes 31b and 31e from traveling on the upper part of the cylindrical containers 16k and 16m.

In this configuration, the cooling water cooled by the cooling tower 24 and having a temperature of about 40 ° C. in summer is cooled from the forward water pipe 23 d to the cooling pipe 31 b so as to cool the cylindrical containers 16 k and 16 m. , 31e through the return water pipe 25d, and the surface temperature of the cylindrical containers 16k, 16m becomes about 65 ° C. For this reason, while the cooling water cooled to about 20 ° C. by using the refrigerator 7 is used as in the prior art, in the present invention, the cooling water from the cooling tower 24 which reaches about 40 ° C. in summer is used. It can be cooled with water,
It is also possible to make the refrigerator 7 unnecessary. In addition, a plurality of cooling pipes 6d arranged in the longitudinal direction above the inside of the cave 1d as in the related art become unnecessary, and the installation space for the plurality of cooling pipes 6d can be reduced.

The cooling pipes 31b and 31e are connected to the cylindrical container 1
Since the water jacket 13 is provided so as to be in contact with 6k and 16m, it is not necessary to perform a difficult work of welding the water jacket 13 to the cylindrical container 9n in a gas-tight and water-tight manner as in the related art. Furthermore, the cooling pipe 31b has the same length as the cooling pipe 31e and is connected at the folded portion 31d, that is, one cooling pipe cools the same length over two lines. It is arranged. For this reason, the current flowing through the two lines by the same amount becomes one of the currents flowing through the other line until the other line stops due to an accident or the like.
Even if the current is doubled and the heat generation is quadrupled, it is not necessary to flow the cooling water at a flow rate four times the flow rate that had been used up to that point, and the cooling water flows to the cooling pipes 31b and 31e up to that time. It is possible to sufficiently cool only by flowing a flow rate twice as high as the flow rate.

Embodiment 5 In the above, the present invention relates to a cylindrical container, an outgoing water pipe, a return water pipe and a cooling pipe,
Although described in the case of being placed in a cave, even if a metal cylindrical container containing a power transmission conductor and filling with an insulating gas is placed on the ground, it is placed along the longitudinal direction of the cylindrical container. Outgoing water pipe for cooling water flow, return water water pipe arranged along the longitudinal direction of the cylindrical container, and cooling water flowing therethrough, and forward water water pipe connected to both cylindrical water pipes and connected to both water pipes The present invention can be similarly applied by providing a cooling pipe for cooling the cylindrical container by flowing cooling water through the return water pipe.

Also, the description has been made using a pipe air transmission line made of a metal cylindrical container containing a power transmission conductor and filled with an insulating gas as the transmission line, but the heat generation line installed in the cave or on the ground is used. It can also be applied to cooling of power cables.
Since the diameter of the power cable is relatively smaller than that of the pipeline air line, not only two cooling pipes but also one in the cross section of the power cable are arranged along the power cable. In some cases, it can be cooled sufficiently.

[0079]

Since the present invention is configured as described above, it has the following effects. A metallic cylindrical container containing a power transmission conductor and filled with an insulating gas, an outward water pipe arranged along the longitudinal direction of the cylindrical container, through which cooling water flows, and arranged along the longitudinal direction of the cylindrical container for cooling. A water return pipe for water circulation, and a cooling pipe that is in contact with the cylindrical vessel and is connected to both water pipes to flow cooling water from the water supply pipe for forward path to the water pipe for return path to cool the cylindrical vessel. Thereby, the heat of the cylindrical container caused by the heat generation of the conductor or the like can be transferred to the cooling pipe through which the cooling water flows in solid contact, and the cylindrical container can be relatively uniformly cooled from one end to the other end in the longitudinal direction. Further, since it is not necessary to weld a water jacket on the upper part of the cylindrical container, it is possible to reduce the difficult work of welding airtight and watertight on site.

A first phase conductor for three-phase separated power transmission,
A metallic first cylindrical container, a metallic second cylindrical container, and a metallic third cylindrical container each containing a second-phase conductor and a third-phase conductor and containing an insulating gas; An outgoing water pipe arranged along the longitudinal direction of the vessel and through which cooling water flows, a return water pipe arranged along the longitudinal direction of the cylindrical vessel and through which cooling water flows, and both water pipes contacting along the cylindrical vessel A first cooling pipe for cooling the first cylindrical vessel by flowing cooling water from the outward water pipe to the return water pipe, a second cooling pipe for cooling the second cylindrical vessel, and a third cooling pipe. Is provided with the third cooling pipe for cooling the cylindrical container, the heat of the cylindrical container caused by the heat generation of the conductor and the like can be transferred to the cooling pipe through which the cooling water flows in solid contact, and the longitudinal direction of the cylindrical container Can be cooled relatively uniformly from one end to the other. Furthermore, since it is not necessary to weld a water jacket on the upper part of the cylindrical container, it is possible to reduce difficult work of airtightly and watertightly welding on site.

Further, a first metal conductor containing a first-phase conductor, a second-phase conductor, and a third-phase conductor for three-phase-separated power transmission of a first line and containing an insulating gas is provided. A cylindrical container, a metallic second cylindrical container, and a metallic third cylindrical container, which are disposed along the longitudinal direction opposite to the first line and the second line for three-phase separated type power transmission; A metallic fourth cylindrical container housing the one-phase conductor, the second-phase conductor, and the third-phase conductor and enclosing an insulating gas therein;
A cylindrical container and a metallic sixth cylindrical container, an outgoing water pipe arranged along the longitudinal direction of the line and through which cooling water flows,
A return water pipe that is arranged along the longitudinal direction of the line and through which cooling water flows, and is connected along both cylindrical containers and connected to both water pipes to flow cooling water from the outward water pipe to the return water pipe. A first cooling pipe for cooling the first cylindrical vessel, a second cooling pipe for cooling the second cylindrical vessel, a third cooling pipe for cooling the third cylindrical vessel, and cooling the fourth cylindrical vessel. A fourth cooling pipe for cooling the fifth cylindrical container, and a sixth cooling pipe for cooling the sixth cylindrical container, thereby providing a cylindrical container caused by heat generation of a conductor or the like. Can be transferred to the cooling pipe through which the cooling water flows in solid contact, and can be relatively uniformly cooled from one end to the other end in the longitudinal direction of the cylindrical container. Furthermore, since it is not necessary to weld a water jacket on the upper part of the cylindrical container,
Difficult work of welding in a watertight manner can be reduced. Further, the outgoing water pipe and the return water pipe can be shared for the first line and the second line.

Also, a metallic cylindrical container containing a three-phase conductor for three-phase batch power transmission and containing an insulating gas, and an outgoing water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows. , A return water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows, and a cooling water flowing from the outward water pipe to the return water water pipe which is in contact with the cylindrical container and connected to both water pipes. By providing a cooling pipe that cools the cylindrical container, the heat of the cylindrical container caused by the heat generation of the conductor and the like can be transferred to the cooling pipe through which the cooling water flows in solid contact,
Cooling can be performed relatively uniformly from one end to the other in the longitudinal direction of the cylindrical container. Furthermore, since it is not necessary to weld a water jacket on the upper part of the cylindrical container, it is possible to reduce difficult work of airtightly and watertightly welding on site.

Further, a first cylindrical container made of metal containing a three-phase conductor for three-phase batch power transmission of the first line and filled with an insulating gas, and has a longitudinal direction opposed to the first cylindrical container. A metallic second cylindrical container, which is arranged along the direction and accommodates a three-phase conductor for three-phase batch transmission of the second line, and which is filled with an insulating gas, is disposed along the longitudinal direction of the cylindrical container. Outgoing water pipe through which cooling water flows, returning water pipe arranged along the longitudinal direction of the cylindrical vessel, and cooling water flowing therethrough, and outgoing water pipe connected along both cylindrical vessels and connected to both water pipes The first cooling pipe for cooling the first cylindrical vessel by flowing cooling water through the return water pipe, and the second cooling pipe for cooling the second cylindrical vessel. The heat of the cylindrical vessel caused by the heat is transferred to the cooling pipe through which the cooling water flows in solid contact. It can relatively uniformly cooled over the other end from the one longitudinal end of the cylindrical container. Furthermore, since it is not necessary to weld a water jacket on the upper part of the cylindrical container, it is possible to reduce difficult work of airtightly and watertightly welding on site. Further, the outgoing water pipe and the return water pipe can be shared for the first line and the second line.

Further, the cooling pipe is connected to the water pipe for the outward path to allow the cooling water to flow in, and is contacted along the cylindrical vessel of the first circuit to cool the cylindrical vessel and to cool the cylindrical vessel of the second circuit. Cooling the cylindrical container by contacting it along, connecting to the return water pipe and arranging it so that the cooling water flows out, one of the two lines fails and the remaining one line is more than before the failure. When flowing the increased current, the cooling water of the cooling pipe can be effectively used.

Further, by disposing the cylindrical container, the water pipe for the outward path, the water pipe for the return path, and the cooling pipe in the sinus, the cylindrical vessel in the sinus in a limited space can be effectively cooled.

Further, the expansion joint is arranged at a predetermined distance in the longitudinal direction of the cylindrical container, and the cooling pipe is arranged between the adjacent expansion joints, so that there is no need to provide the expansion joint in the cooling pipe. can do. .

In a cross section perpendicular to the axial direction of the cylindrical container, an angle formed by a line passing through the center point of the cylindrical container with respect to a horizontal line passing through the center point of the cylindrical container at the outer peripheral surface of the upper half of the cylindrical container. The central point of the cooling pipe at a position within the angle range of 10 ° to 60 ° reduces the temperature difference between the upper part and the lower part of the cylindrical container. Can be obtained.

Further, since a good heat conductive heat transfer seat is interposed between the cylindrical container and the cooling pipe, it is possible to reduce a gap between the cylindrical container and the cooling pipe.
Heat transfer between the cylindrical container and the cooling pipe can be improved.

Also, a transmission line of a first line, a transmission line of a second line disposed along the longitudinal direction of the transmission line of the first line and facing the transmission line of the first line, and along the longitudinal direction of the transmission line Outgoing water pipes that are arranged and circulated in the cooling water, return water pipes that are arranged along the longitudinal direction of the power transmission line and circulated in the cooling water, and connected to the outgoing water pipes to flow the cooling water, The cooling water is contacted along the transmission line of the first line to cool the transmission line, and the cooling line is contacted along the transmission line of the second line to cool the cooling line. By having a cooling pipe to flow out,
Since the cooling pipe is arranged to cool over two lines,
When one of the two lines fails and a current that is larger than that before the failure flows in the remaining one line, the cooling water in the cooling pipe can be effectively used.

Further, since a good heat conductive heat transfer seat is interposed between the transmission line and the cooling pipe, it is possible to reduce the formation of a gap between the transmission line and the cooling pipe.
The heat transfer between the transmission line and the cooling pipe can be improved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a transmission line apparatus for cooling a three-phase separated pipeline air transmission line installed in an underground passageway according to a first embodiment of the present invention; .

FIG. 2 is a schematic plan view seen from A in FIG. 1;

FIG. 3 is a cross-sectional view of a transmission line apparatus for cooling a three-phase separated pipeline air transmission line laid in a sinus according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a main part of the cave of FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a perspective view showing a main part of FIG. 5;

FIG. 7 is an explanatory diagram showing a relationship between a position of a cooling pipe in FIG. 5 and a surface temperature of a cylindrical container.

FIG. 8 is an explanatory diagram showing another example of the first embodiment of the present invention.

FIG. 9 is a cross-sectional view of a transmission line apparatus for cooling a two-phase, three-phase separated pipeline air transmission line installed in a sinus according to a second embodiment of the present invention.

FIG. 10 is a plan view showing a main part of the sinus road shown in FIG.

FIG. 11 is a cross-sectional view of a transmission line apparatus for cooling a three-phase batch-type pipeline air transmission line laid in a sinus according to a third embodiment of the present invention.

FIG. 12 is a plan view showing a main part of the cave of FIG. 11 from which the cave is removed;

FIG. 13 is a cross-sectional view of a transmission line apparatus for cooling a two-phase three-phase collective pipeline air transmission line laid in a sinus according to a fourth embodiment of the present invention.

FIG. 14 is a plan view showing a main part of the cave of FIG. 13 from which the passage is removed.

FIG. 15 is a conceptual diagram of a conventional transmission line device for cooling a pipeline air transmission line laid in a tunnel provided in the ground.

FIG. 16 is a cross-sectional view of a conventional transmission line apparatus for cooling a three-phase separated pipeline air transmission line installed in a cave.

FIG. 17 is a cross-sectional view of a conventional transmission line device for cooling a two-phase, three-phase separated pipeline air transmission line laid in a canal.

FIG. 18 is a cross-sectional view of a conventional transmission line apparatus for cooling a one-line three-phase collective pipeline air transmission line laid in a tunnel.

FIG. 19 is a sectional view of a conventional transmission line apparatus for cooling a two-phase three-phase collective pipeline air transmission line laid in a canal.

FIG. 20 is a cross-sectional view of a conventional pipe-in-air transmission line with a water jacket attached to a cylindrical container.

[Explanation of symbols]

14a, 14b, 14c, 14d Cave 16a, 16b, 16c, 16d, 16e, 16f, 1
6g, 16h, 16i, 16j, 16k, 16m Cylindrical containers 17a, 17b, 17c, 17d, 17e, 17f, 1
7g, 17h, 17i, 17j, 17k, 17m Conductors 23a, 23b, 23c, 23d Outgoing water pipes 25a, 25b, 25c, 25d Incoming water pipes 26a, 26e, 26g Cooling pipe 27 Heat transfer seats 30a, 30d, 30e , 30f, 30h, 30i Cooling pipes 31a, 31b, 31e Cooling pipes

──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshio Hirayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Takayuki Kawai 1 Higashi-Shinmachi, Higashi-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. (72) Inventor Akinobu Miyazaki 2-34-2 Yokota, Atsuta-ku, Nagoya City, Aichi Prefecture Chubu Electric Power Co., Inc.Central Power Substation Construction Office (72) Inventor Manabu Yagi 2-3-24, Yokota, Atsuta-ku, Nagoya City, Aichi Prefecture No. Chubu Electric Power Co., Inc. Central Transmission & Substation Construction (56) References JP-A-58-49020 (JP, A) JP-A-58-86818 (JP, A) JP-A-1-97118 (JP, A) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) H01B 7/34 H01B 9/00-9/06 H02G 15/20-15/34 H02G 5/00-5/10 391

Claims (12)

(57) [Claims] 1. A metallic cylindrical container containing a power transmission conductor and filled with an insulating gas, an outward water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows, and a longitudinal portion of the cylindrical container. A return water pipe that is arranged along the direction and through which the cooling water flows, and the cooling water flows from the outward water pipe to the return water pipe that is connected to the two water pipes while being in contact with the cylindrical container. A power transmission line device provided with a cooling pipe for cooling the cylindrical container. 2. A first phase conductor for three-phase separated power transmission,
A metallic first cylindrical container, a metallic second cylindrical container, and a metallic third cylindrical container, each containing a phase conductor and a third phase conductor and enclosing an insulating gas; An outward water pipe that is arranged along the longitudinal direction and through which cooling water flows, a return water water pipe that is arranged along the longitudinal direction of the cylindrical vessel and through which cooling water flows, A first cooling pipe for cooling the first cylindrical vessel by flowing the cooling water from the outward water pipe to the return water pipe by connecting to a water pipe, and a second cooling pipe for cooling the second cylindrical vessel; A power transmission line device, comprising: a cooling pipe according to (1) and a third cooling pipe for cooling the third cylindrical container. 3. A metallic first package containing a first phase conductor, a second phase conductor, and a third phase conductor for three-phase separated power transmission of a first line, and containing an insulating gas. A cylindrical container, a metallic second cylindrical container and a metallic third cylindrical container,
A first-phase conductor for three-phase-separated power transmission of a second line, which is disposed along the longitudinal direction opposite to the first line;
A fourth metallic container, a fifth metallic container, and a sixth metallic cylindrical container, each containing a phase conductor and a third phase conductor and enclosing an insulating gas therein, and a length of the line. A water pipe for the outward path, which is arranged along the direction, through which the cooling water flows, a water pipe for the return path, which is arranged along the longitudinal direction of the line, and through which the cooling water flows, and both the water pipes which are in contact with the cylindrical containers and are in contact with each other. The cooling water is circulated from the outgoing water pipe to the inward water pipe and connected to the first water pipe.
A first cooling tube for cooling the cylindrical container, a second cooling tube for cooling the second cylindrical container, a third cooling tube for cooling the third cylindrical container, and cooling the fourth cylindrical container Fourth
A transmission line apparatus comprising: a cooling pipe of (5), a fifth cooling pipe for cooling the fifth cylindrical container, and a sixth cooling pipe for cooling the sixth cylindrical container. 4. A metal cylindrical container containing a three-phase conductor for three-phase batch power transmission and enclosing an insulating gas, and is disposed along the longitudinal direction of the cylindrical container and is used for transmitting the cooling water for the outward path. A water pipe, a return water pipe arranged along the longitudinal direction of the cylindrical container and through which cooling water flows, and a water pipe for the return path that is in contact with the cylindrical container and connected to the two water pipes and is connected to the water pipe for the outward path. A transmission line device provided with a cooling pipe for cooling the cylindrical container by flowing the cooling water through a water pipe. 5. A metallic first cylindrical container housing a three-phase conductor for a three-phase batch power transmission of a first line and enclosing an insulating gas, and opposing the first cylindrical container. A metallic second cylindrical container which is arranged along the longitudinal direction, accommodates a three-phase conductor for three-phase batch transmission of the second line, and insulates with an insulating gas, along the longitudinal direction of the cylindrical container An outgoing water pipe for cooling water to be arranged, a return water pipe for cooling water arranged along the longitudinal direction of the cylindrical container, and a contact along each cylindrical container and connected to both water pipes. A first cooling pipe for cooling the first cylindrical container by flowing the cooling water from the outward water pipe to the return water pipe, and a second cooling pipe for cooling the second cylindrical container. Transmission line device equipped with 6. The cooling pipe is connected to an outgoing water supply pipe to allow cooling water to flow in, cools the cylindrical vessel along the cylindrical vessel of the first line, and cools the cylindrical vessel to the cylindrical vessel of the second line. The transmission line device according to claim 3 or 5, wherein the cylindrical container is cooled so as to be in contact therewith and connected to a return water pipe so that the cooling water flows out. 7. The transmission line apparatus according to claim 1, wherein the cylindrical vessel, the outgoing water pipe, the return water pipe, and the cooling pipe are arranged in a passage. 8. The expansion joint according to claim 1, wherein an expansion joint is arranged at a predetermined distance in the longitudinal direction of the cylindrical container, and a cooling pipe is arranged between adjacent expansion joints. Transmission line equipment. 9. An angle formed by a line passing through the center point of the cylindrical container with respect to a horizontal line passing through the center point of the cylindrical container in the upper half outer peripheral surface of the cylindrical container in a cross section perpendicular to the axial direction of the cylindrical container. The transmission line device according to any one of claims 1 to 8, wherein a center point of the cooling pipe is arranged at a position within an angle range of 10 ° to 60 °. 10. The transmission line apparatus according to claim 1, wherein a good heat conductive heat transfer seat is interposed between the cylindrical vessel and the cooling pipe. 11. A transmission line of a first line, a transmission line of a second line arranged along the longitudinal direction of the transmission line of the first line, and arranged along the longitudinal direction of the transmission line. Outgoing water pipe through which cooling water flows, arranged in the longitudinal direction of the power line, returning water water pipe through which cooling water flows, and connected to the outward water pipe to allow the cooling water to flow. Cooling the transmission line by contacting along the transmission line of the first circuit and cooling the transmission line by contacting along the transmission line of the second circuit, and connecting to the return water pipe. A transmission line device including a cooling pipe through which the cooling water flows out. 12. The transmission line apparatus according to claim 11, wherein a good heat conductive heat transfer seat is interposed between the transmission line and the cooling pipe.