JPH0322443Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a distribution tower that houses transformers and distribution equipment, and particularly relates to a snow melting device for a distribution tower that is ideal for installation in areas with heavy snowfall.

In recent years, in order to secure substation personnel and improve the efficiency of substation maintenance and management, unmanned measures have been steadily promoted at small and medium-sized substations, whether in urban areas or mountainous areas, and in addition, the number of substations has been reduced. In order to reduce energy consumption, shorten construction periods, and reduce costs, metal-clad distribution towers consisting of oil-immersed transformers and cubicles have been installed, and these distribution towers can be maintained and managed by remote control from a command center. By doing so, we aim to make it unmanned. However, in the above distribution towers installed in snowy and cold regions, it is necessary to periodically remove snow from the roofs of the distribution towers in order to protect the distribution towers from snow damage. However, in reality, snow removal work at distribution towers has been extremely difficult due to a lack of personnel for snow removal, or because the distribution towers themselves are often installed in areas with deep snow. For this reason, for distribution towers installed in areas with heavy snowfall,
To protect distribution towers from snow damage, either the distribution tower buildings themselves were constructed to be strong enough to withstand the weight of snow, or electric heating devices (e.g. surface heating elements) were installed on the entire roof of the distribution tower. . However, the former method requires a lot of construction materials, which makes construction time-consuming and increases construction costs, while the latter method is very uneconomical because it requires electricity to melt the snow on the roof. In addition, as a result of using an electric heating device, the construction cost of the distribution tower is high, similar to the former case.

This invention eliminates the above-mentioned drawbacks and saves energy with a simple structure that effectively utilizes the waste heat generated during transformer operation to efficiently melt snow accumulated on the roof of a distribution tower. The embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes a power distribution tower building, and this building 1 consists of a horizontally long box body 2 and this box body. 2, and a roof 3 covering the upper surface of 2. In particular, the roof 3
The box body is constructed using steel plates at different angles for the front (to the left in Figure 2) and the rear (to the right in Figure 2) of the building 1, and the angle of inclination is such that the snow on the roof 3 can easily slide off. It is formed integrally with 2. Reference numeral 4 designates an oil-filled transformer housed in the box body 2, and 5 designates a cubicle. The oil-filled transformer 4 is surrounded by a soundproof wall 4a. 6 is a heat sink attached to the transformer 4 inside the box body 2; 7 is a high-voltage bushing of the transformer 4; 8 is a low-voltage bushing; 9 is a heat insulating material with a sound absorbing effect made of glass wool, etc.; is attached to the entire circumference of the inner wall and the floor surface, and is attached to the back side of the roof 3, leaving only the sloped lower end faces a and b of the required width from the eaves, as shown in Figure 2. It is set up. Reference numeral 10 denotes an air intake port opened in one side wall of the box body 2 to ventilate the inside of the box body 2 during the winter, and an automatic shutter 11 is attached to this air intake port 10, which opens and closes according to the oil temperature in the transformer 4. ing. 12
A ventilation fan is attached to the upper part of the side wall of the box body 2 and has an intake port 10, and is operated in accordance with the oil temperature in the same way as the automatic shutter 11 described above. 1
Reference numeral 3 designates an air intake port for the summer season, which is also opened on one side wall of the box body 2, and a lid body 14 equipped with a heat insulating material inside for the winter season.
completely closed by. 15 is a wire mesh attached to the intake port 13 to prevent small animals from entering the box body 2, and 16 is a wind direction guide.

Next, to explain the operation, when the transformer 4 is energized, heat is always generated in the coils and iron core, and that heat is transferred to the oil inside the transformer 4, and is transmitted to the box through the radiator 6 attached to the transformer 4. The air near the radiator 6 is heated by this heat radiation, and as shown by the arrow in the figure, it rises due to the action of buoyancy and reaches the space c inside the roof 3 above the box 2. accumulates in
Furthermore, the heat generated by the operation of the cubicle 5 also rises above the box body 2 and accumulates in the space c, similar to the heat radiated from the radiator 6. As a result, the temperature of the space c in the building 1 becomes considerably higher than that of the lower part of the box 2 and the outside temperature due to the radiation effect of the exhaust heat generated from the equipment. This is because the building 1 itself has a heat insulating structure and is also manufactured to have a sealed structure. Therefore, the space c in the upper part of the building 1 tends to reach a high temperature in a relatively short period of time. However, since the insulation material 9 is pasted on the back side of the roof 3 with only the sloped lower end faces a and b of the required width left from the eaves, similar to the case 2, the space c above the inside of the building 1 is covered with heat insulating material 9. Due to the relatively warm air that has accumulated, the portions of the sloped lower end surfaces a and b of the roof 3 to which the heat insulating material 9 is not attached are gradually heated. Therefore, the snow and ice accumulated on the sloped lower end surfaces a, b of the roof 3 are gradually melted by the heat that heats the sloped lower end surfaces a, b, and the sloped lower end surfaces a, b are gradually melted. Form a water film on top. That is, the snow and ice accumulated on the sloped lower end surfaces a and b near the eaves of the roof 3, which are obstructing the sliding of roof snow, are naturally slid down and removed from the roof 3. As a result, the snow on the roof 3 naturally slides down the slope of the roof 3 due to its gravitational force, falls to the ground from the sloped lower end surfaces a and b of the roof 3, and is removed.

Next, since the building 1 has a sealed and insulated structure as mentioned above, the exhaust heat from the equipment is used to build the building 1.
If the internal temperature rises more than necessary, it will have an adverse effect on the equipment. At this time, in this case, when the amount of oil in the transformer 4 reaches the required temperature (for example, 85 degrees Celsius), the automatic shutter 11 of the intake port 10 automatically opens to introduce outside air into the box body 2.
The ventilation fan 12 also operates automatically to ventilate the inside of the box body 2. As a result, the inside of the box 2 is maintained at a temperature that does not interfere with the operation of the equipment.

In addition, outside the winter season, that is, when there is no need to melt snow on the roof 3, by removing the lid 14 and opening the intake port 13, outside air is introduced into the box 2 to cool the equipment. In addition, when the oil temperature of the transformer 4 exceeds the required temperature, the ventilation fan 12 is activated to increase the amount of ventilation, thereby discharging the waste heat from the equipment to the outside, and removing the heat from the transformer 4 and the cubicle. Perform cooling in step 5.

In the present invention, the heat insulating material 9 is attached to the back side of the roof 3 with the sloped lower end surfaces a and b of the required width remaining from the eaves of the roof 3. Alternatively, the insulation material 9 may be thickened stepwise as it reaches the upper part of the roof 3, or the insulation material 9 may be thinner at the lower part of the roof 3, and vice versa. Accordingly, by pasting the heat insulating material 9 which is formed in an inclined shape with the wall thickness gradually increasing, the heat insulation effect of the warmed air accumulated in the space c at the back of the roof 3 is further enhanced. The present invention is also valid.

In addition, as shown in FIG. 3, in addition to the sloped lower end surfaces a and b of the roof 3, the insulation material 9 is also left on the back surface of the top of the roof 3.
is attached to the back surface of the roof 3, and the heated air accumulated in the space c warms the part of the back surface of the top of the roof 3 where the insulation material 9 is not present, and the snow on the top of the roof 3 is sloped. By melting the snow and dividing the roof snow into two in the same way as the lower end surfaces a and b, it is possible to make it easier for the roof snow to slide off naturally, or by forming the longitudinal ends of the roof 3 into sloped lower end surfaces a and b. Similarly, the heat insulating material 9 may not be pasted, and this portion may be heated with heated air to melt the snow on both ends of the roof 3 and help the natural sliding of the snow from the roof.

Further, although the present invention has been described with reference to an embodiment in which the inclination angle of the roof 3 is different between the front side and the rear side of the building 1, the present invention is not limited to this, and the same angle may be used. The present invention can also be achieved by installing an electric heating device (not shown) only on the lower sloped end surfaces a and b (the eaves portion) of the roof 3, and energizing this electric heating device as necessary to enhance the snow melting effect at the eaves portion. It is something.

As mentioned above, this invention affixes insulating material to the walls and floors of the distribution tower building, and also affixes insulating material to the back of the roof of the building, leaving a sloped lower edge of the required width from the eaves. The interior of the above building is heated by effectively utilizing the waste heat radiated from equipment such as transformers and cubicles housed inside the building, and this heated air is used to heat the steel plate on the attic surface without insulation. This system gradually warms up the roof and removes the snow and ice that has accumulated on the eaves of the roof, allowing other snow on the roof to slide off naturally and remove the snow from the roof. This is completely different from conventional methods, in which roof snow is removed manually, the building structure is made strong enough to withstand the required amount of snow, or electric heating equipment is installed across the roof for snow melting. , This plan involves pasting insulation material to the required thickness on the inside of the building and on the back of the roof, except for the eaves.
Exhaust heat generated from equipment stored in the building is prevented from leaking outside as much as possible, and is allowed to accumulate in the upper part of the building, and this accumulated warm air is used to protect the eaves of a roof that does not have any insulation material and is in contact with the inside of the building. Snow removal from the distribution tower roof is done by directly heating the area, removing snow and ice buildup on the eaves, and allowing the roof snow to slide off naturally, so snow removal does not require any human intervention. , can be carried out smoothly without using any special heating means. In addition, when melting snow on a roof, it is only necessary to heat the part of the eaves of the roof that is in contact with the building that does not have insulation and melt only the snow and ice in this part, so only the waste heat from the equipment is used. In addition, it is well known that snow on roofs will naturally slide down by removing snow from the eaves, so this proposal is based on waste heat from equipment. This is generated from equipment due to the structure of the building, which uses insulation material to retain heat at high temperatures and uses this accumulated warm air to warm the eaves of the roof. In addition to effectively utilizing waste heat, the distribution tower can be manufactured with a simple structure and at low cost. Moreover, the energy for snow melting takes maximum advantage of the waste heat generated during the operation of the equipment, and therefore
Electric power for snow melting has many excellent practical effects, such as being able to melt snow on roofs economically as a result of using only the minimum necessary amount of electricity.

[Brief explanation of drawings]

Fig. 1 is a longitudinal front view schematically showing a distribution tower equipped with the snow melting device of the present invention, Fig. 2 is a longitudinal side view, and Fig. 3
The figure is a longitudinal sectional view showing another embodiment of the present invention. 2...Box body, 3...Roof, 4...Oil-immersed transformer,
5...Cubicle, 6...Radiator, 9...Insulating material.

Claims (1)

[Scope of utility model registration request] In a distribution tower that is equipped with an air inlet that can be opened and closed at the bottom of one side wall of a box housing an oil-immersed transformer and a cubicle, and an exhaust means such as a ventilation fan at the top, the wall and floor inside the box of the distribution tower are The back side of the roof of the power distribution tower, which is installed at the top of the box and tilted at the required angle, is covered with heat insulating material. A snow melting device for power distribution towers that features a heat insulating material attached.