JPH034121Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cooling device for power cables installed underground, such as in caves.

[Prior art] As the demand for electricity increases, in places where many cables are laid close to each other, such as near the entrance of a substation, the temperature of the cables at that location increases abnormally due to the heat generated by the cables. Power transmission capacity may be limited, and in urban areas, cable temperatures may become abnormal because multiple cable lines are partially close together or hot water pipes, steam pipes, etc. are installed close to the lines. There is a place to rise to.

In such a place, as shown in Figs. 3 and 4, a heat pipe 12 is attached to the cable line 11 laid underground A, and the heat dissipation part 13 of this heat pipe 12 is connected as shown in Fig. 3. It can be installed upright on the ground, or underground as shown in Figure 4.
By embedding the cable 11 in the cable 11, local temperature rise in the cable 11 is suppressed.

[Problem to be solved by the invention] When burying the heat dissipating section 13 of the heat pipe 12 underground as described above, the land must be excavated and backfilled, which takes a long time, especially in urban areas. Not only is this restricted, but there is also a risk that the heat dissipation section 13 of the buried heat pipe 12 and its cooling device may be destroyed by the weight, vibration, etc. of the vehicle running on the ground.

Furthermore, when installing on the ground, there is a problem in that it is difficult to obtain special land for installing the heat dissipation section in urban areas, and a large amount of construction cost is required.

The purpose of the present invention is to provide a cable cooling device that does not require a special site for the installation of the heat dissipation part, and allows the heat pipe heat dissipation part to be installed using existing street facilities on the ground. .

[Means for Solving the Problems] In order to achieve the above object, the cable cooling device of the present invention has a heat pipe 2 installed along the longitudinal direction of the cable 1 installed underground, and A heat radiating part 3 connected to the street facility 4 is led out to the ground, and this heat radiating part 3 is installed in a hollow part 6 of a street facility 4 having a ventilation hole 5.

[Function] The heat pipe 2 absorbs the heat of the cable, and the heat dissipation section 3 dissipates the absorbed heat of the heat pipe 2, thereby suppressing the temperature rise of the cable.

The heat radiating part 3 installed in the hollow part 6 of the street facility 4 installed on the road, such as a so-called road installation facility such as a street light, radiates heat in the hollow part 6. The heat is dissipated to the outside with the circulating air passing through the ventilation holes 5 of the street facility 4.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows one embodiment of the cable cooling device of the present invention, and FIG. 2 shows another embodiment.

In Fig. 1, 1 is a cable laid underground A, and 2 is a heat pipe laid underground A along the underground cable 1. A medium is enclosed, and this heat pipe 2 connects the cable 1
is cooled and its temperature rise is suppressed.

Reference numeral 3 denotes a heat radiating section connected to the heat pipe 2 , and the heat exchange medium in the heat pipe 2 that has absorbed the heat of the cable 1 radiates the absorbed heat in the heat radiating section 3 .

4 is a street facility installed on the road, such as a so-called roadside facility such as a street light, and 6 is a hollow part of the street facility 4. This street facility 4 can use existing street facilities installed on the road.

5 is a ventilation hole provided in this street facility 4, and this ventilation hole 5 allows the hollow part 6 of the street facility 4 to be opened.
communicates with the outside air.

The embodiment shown in the first diagram is an example in which a street light 7 is used as the street facility 4, and the hollow part 6 of the street facility 4 is the hollow part in the pipe of the pole pipe 4 (shown in cross section) of the street light 7 in this embodiment. 6, and an example is shown in which ventilation holes 5 are provided in the upper and lower parts. Note that the pole pipes and the like of the street facility 4 may be hard pipes such as hard aluminum pipes and hard synthetic resin pipes.

The heat pipe 2 laid along the cable 1 leads out its heat radiating part 3 to the ground, and this heat radiating part 3 is installed in the hollow part 6 of the street facility 4.

The heat pipe 2 that has absorbed the heat of the cable 1 radiates heat in the heat radiating part 3 installed in the hollow part 6 of the street facility 4 as described above, and the heat radiated from the heat radiating part 3 into the hollow part 6 is It is radiated to the outside together with the circulating air passing through the ventilation holes 5 of the street facility 4, thereby suppressing the rise in temperature of the cable 1.

The embodiment shown in the first drawing described above shows an example in which heat is radiated by natural ventilation by air flowing through the ventilation holes 5 above and below the pole tube of the street light 7, but as shown in the second drawing, A fan 8 may be provided in the hollow part 6 to cool the heat radiating part 3 by forced air cooling.

[Effects of the invention] As mentioned above, in this invention, the heat dissipation part of the heat pipe along the cable is led out to the ground and installed in the hollow part of the street facility that has ventilation holes, so it is possible to drive the heat pipe like before. There is no risk of damage due to vehicle weight or vibration, and the heat pipe heat dissipation section can be installed using existing street facilities such as street lights, so it is not possible to install heat dissipation sections in urban areas like in the past. The cable cooling device can be installed without the need to obtain special land for installation and without requiring large construction costs.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway explanatory diagram of one embodiment of the present invention;
FIG. 2 is a partially cutaway explanatory diagram of another embodiment, and FIGS. 3 and 4 are diagrams showing a conventional example. 1: cable, 2: heat pipe, 3: heat dissipation section, 4: street facility, 5: ventilation hole, 6: hollow section.

Claims (1)

[Scope of utility model registration request] A heat pipe 2 is laid along the longitudinal direction of the cable 1 laid underground, and the heat pipe 2
A cable cooling device in which a heat dissipating section 3 connected to a cable is led out to the ground, and the heat dissipating section 3 is installed inside a hollow section 6 of a street facility 4 having a ventilation hole 5.