JPS5851577B2 - Frozen water surface opening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frozen water surface opening device that ensures ventilation when the water surface of a water tank or the like freezes.

For example, if a water tank installed outdoors for the purpose of extinguishing fires or the like falls below 0℃, the water surface inside the tank will freeze1-2 and the water and atmosphere will be cut off by ice. be done.

At this time, if you try to release water from the outlet at the bottom of the tank to extinguish the fire, the atmospheric pressure will not reach the water surface, making it difficult for the water to come out, making it impossible to extinguish the fire.

For this reason, conventionally, when installing a water tank outdoors in a cold region, etc., it is necessary to store water 1 and press the button as shown in Figure 1.
A heater H made of a heating wire or a hot water pipe is attached to the outer circumference of the tank body 2 to heat the tank body 2.
was wearing.

However, such a structure has the disadvantage that the construction period is long and the equipment cost is also large.

I cut it.

When the heater H is a heat-generating wire, there is a drawback that a large amount of electric power is used to keep the entire circumference warm, and running costs are high.

On the other hand, if the heater H is a hot water pipe, a separate Klrl and boiler are required, which also has the drawback of increasing equipment costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a frozen water surface opening device that has a very simple structure, is inexpensive, and can always ensure ventilation, water supply, etc. of the frozen water surface.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

FIGS. 2 to 4 show an example in which the present invention is applied to a frozen water level opening device for a water tank.

As shown in the figure, the water tank 2 of this embodiment stores water 1 therein, has an air intake port 3 on the top plate 2A, and has a flange 4 on the outer periphery of the upper end thereof.

A make-up water pipe 5 is connected to the inside of the water tank 2 so that water can be supplied through the two tank top plates.

Water 1 in tank 2 from air intake port 3 on tank top plate 2
The frozen water surface opening device 6 of the present invention is suspended in the container.

This frozen water surface opening device 6 has a heater 7 inserted into the water 1 from the air intake port 3.

The heater 7 includes a heating wire 9 housed in a protective tube 8, and a gap between the protective tube 8 and the heating wire 9 filled with a thermally conductive material 10 such as alumina.

The lower end of the protection tube 8 is closed watertight.

A radial spacer 1 is placed around the outer periphery of the heater T that can be pressed underwater.
A cylindrical body 12 made of a heat insulating material or the like is disposed concentrically through the cylindrical body 1 , and the cylindrical body 12 is fixed to the heater 7 with a spacer 11 .

The cylindrical body 12 is open at the top and bottom, and an air/water passage 13 is formed between the cylindrical body 12 and the heater 7.

A flange 14 with a hole is provided on the outer periphery of the upper end of the protection tube 8 of the heater 7.
is fixed, and this flange 14 rests on the flange 4 of the air intake 3.

A flange 17 of an inverted U-shaped air intake pipe 16 is mounted on the flange 14 of the heater 7 via a packing 15, and the flanges 4, 14, and 17 are fixed with bolts and nuts.

Although not shown, a groove is formed in the radial direction between the flanges 14 and 17, and the heating wire 9 of the heater 7 is led out through this groove and connected to an external power connection box 18.

According to such a frozen water surface opening device 6, by energizing the heating wire 9 and causing the heater 7 to generate heat, even if one person freezes on the water surface, the water surface in the air/water passage 13 in the cylindrical body 12 is frozen. do not.

Therefore, even when water is taken out from the outlet 19 at the bottom of the tank 2 due to a fire, etc., atmospheric pressure is applied to the water surface below the water surface via the air/water passage 13, so water can be taken out without any problem. .

In this case, the heating wire 9 only needs to heat the narrow air/water passage 13 so as not to freeze, and the cylinder body 12 can prevent heat from dissipating, thereby saving power.

Furthermore, in this way, even if the water surface 1A in the tank 2 is frozen, water can be supplied through the air/water passage 13.

In the above embodiment, the cylindrical body 12 is supported by the heater 7 with the spacer 11, but if the cylindrical body 12 is supported on the tank 2 side,
Spacer 11 can be omitted.

This kind of frozen water surface opening device can be used not only for water tanks, but also for
For example, it can be used as a hole for feeding fish under the frozen water surface in a fishpond or the like.

As explained above, according to the frozen water surface opening device according to the present invention, even if the water surface freezes, atmospheric pressure can be lowered to the water surface below the frozen surface.

In particular, the device of the present invention can save electricity because it is only necessary to heat a portion of the water surface.

Furthermore, in this device, a part of the passage around the outer periphery of the heater is surrounded by a cylindrical body, so the area to be heated by the heater can be limited, and the dissipation of heat to unnecessary areas can be suppressed. It is also possible to save power and reduce running costs.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a conventional water tank, FIG. 2 is a partial vertical sectional view showing an example of a water tank incorporating the frozen water surface opening device of the present invention, and FIG. 3 is a frozen water surface according to the present invention. FIG. 4 is a longitudinal side view of the left half of the opening device, and FIG. 4 is a sectional view taken along the line X--X of FIG. 3. 6... Frozen water level opening device, 7... Heater, 12...
・Cylinder body.

Claims (1)

[Claims] 1. A frozen water surface opening device comprising: a heater that penetrates the water surface and is inserted into the water; and a cylindrical body that is disposed around the heater via a passage to partition the water surface.