JPH04135Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an anti-freezing device for a water meter, and more particularly, to a device that uses geothermal heat to prevent the water meter from freezing and breaking.

[Conventional technology]

Conventionally, this type of antifreeze device for a water meter has a lower heat absorbing part buried underground in the bottom plate of the water meter housing, as described in Japanese Utility Model Application Publication No. 55-59775. A structure in which a heat dissipation section is provided at the top of a heat pipe is known.

The geothermal heat absorbed by the heat absorbing part of the heat pipe is radiated into the water meter housing from the heat radiating part.

[Problem that the invention attempts to solve]

In the conventional structure, the inside of the water meter housing is heated by geothermal heat, while the water inside the water meter is cooled from the top by the cold air that enters the water meter housing, and when the temperature reaches 4℃. There is a problem that convection stops and the water in the water meter freezes.

Further, in a structure in which the heat dissipation part of the heat pipe protrudes from the lower part of the water meter, there is a problem that it cannot be installed in an existing water meter unless the water meter is removed.

Therefore, the present invention was developed in view of the above points, and allows direct heat conduction of geothermal heat to the upper part of the water meter, and uses this geothermal heat to reliably heat the upper part of the water meter and prevent it from freezing. It is an object of the present invention to provide a water meter freezing prevention device that can be easily installed in an existing water meter.

[Means for solving problems]

In the present invention, a heat conductive heating ring 20 is integrally attached to the upper heat radiating part 19 of the heat pipe 17, which contacts the outer part of the water meter 7 and has its lower heat absorbing part 18 buried underground. It is characterized in that the heating ring 20 is wound around the outer periphery of the upper body of the water meter 7.

[Effect]

The antifreeze device for a water meter of the present invention has the lower heat absorbing part 18 of the heat pipe 17 buried underground, and the lower heat absorbing part 18 of the heat pipe 17 is attached to the heating ring 20 fastened to the outer periphery of the upper body of the water meter 7. The geothermal heat absorbed by the water meter 7 is thermally conducted from the upper heat radiating portion 19, and the outer periphery of the upper body of the water meter 7 is heated by the heating ring 20, thereby preventing the water in the water meter 7 from cooling and freezing. Ru.

〔Example〕

The configuration of an embodiment of the present invention will be explained with reference to FIG.

Reference numeral 1 denotes a water meter housing, which is composed of a surrounding frame 3 with a heat insulating material 2 interposed therebetween, a lid plate 5 lined with a heat insulating material 4, and a bottom plate 6.

A water meter 7 is disposed within the housing 1, and water pipes 8, 8 are connected to the water meter 7, and these water pipes 8, 8 are connected to water pipe through holes 9, 9 of the surrounding frame 3. A water stop valve 10 is provided in one of the water conduit pipes 8 near the water meter 7 .

11 is a heat insulation cover body molded from synthetic resin such as foamed polypropylene and foamed polyethylene;
The heat insulating cover body 11 has an open bottom surface so as to be fitted over the water meter 7 from above in a cap shape,
A window hole 12 facing the scale plate of the water meter 7 is formed on the top surface of the water meter 7, and a lid plate 7a of the water meter 7 is attached to the window hole 12 so as to be openable and closable. U-shaped water pipe fitting holes 13, 13 are formed in both side walls from the lower ends.

Reference numeral 14 denotes a mounting table molded from synthetic resin, and this mounting table 14 supports the water meter 7 and the bottom plate 6 of the housing 1.
It is movably disposed between the water meter 7 and supports the water meter 7 thereon.

Furthermore, 17 is a rod-shaped heat pipe, the lower part of which serves as a lower heat absorbing part 18 buried underground, and the upper part thereof has an upper heat radiating part 19 that comes into contact with the outer part of the water meter 7. A heating ring 20 made of, for example, copper and having good thermal conductivity is integrally fixed to the upper end of the upper heat radiation part 19 by welding. This heating ring 20 has holding piece parts 21 extending in an arc shape from a fixed part to the upper heat radiating part 19 on both sides to wrap around and come into contact with the outer periphery of the upper body of the water meter 7. Tightening piece parts 22 are formed by bending opposite to each other at both free ends of the holding piece part 21, and these opposing fastening piece parts 22 are adapted to be fastened with screws, for example, bolts and nuts 23. Further, the heat pipe 17 is filled with a heat medium such as fluorocarbon gas, and when the heat pipe 17 is inserted into the ground, the gas that absorbs geothermal heat in the heat pipe 17 and evaporates is heated from the upper heat radiating part 19. The heating ring 20 absorbs geothermal heat by repeating the action of radiating heat in contact with the ring 20, condensing it, flowing down, absorbing the geothermal heat again, and evaporating, so that the heating ring 20 absorbs the geothermal heat and conducts the heat to the outer periphery of the upper body of the water meter 7. There is.

Next, the operation of this embodiment will be explained.

As shown in FIG. 3 in the water meter housing 1, a mounting table 14 is arranged on the lower side of the water meter 7, and the water meter 7 is placed on this mounting table 14. A heat pipe 17 is inserted into the through hole 15 of the bottom plate 6 of the body 1, and its lower heat absorbing part 18 is buried underground.
Further, the holding pieces 21 on both sides of the heating ring 20 integrated with the heat pipe 17 are brought into contact with the outer periphery of the upper body of the water meter 7 so as to wrap around it. The tightening piece 22 is tightened with bolts and nuts 23. Thereby, the heat pipe 17 is directly set in the water meter 7.

Next, the heat insulating cover body 11 is fitted onto the water meter 7 from above, and this heat insulating cover body 11
Place the lower end opening edge on the mounting table 14.
Thereby, the water meter 7 is covered and protected from the cold air that has entered the water meter housing 1. The geothermal heat absorbed by the lower heat absorbing part 18 of the heat pipe 17 is thermally conducted from the upper heat radiating part 19 to the heating ring 20, and the outer periphery of the upper body of the water meter 7 is heated by the heating ring 20. Be warmed. Also, at this time, since the water meter 7 is entirely surrounded by the heat insulating cover body 11 and the mounting table 14, the upper heat radiating part 19
The heat radiated from the heating ring 20 is secured around the water meter 7 without escaping easily.

Therefore, the outer periphery of the upper body of the water meter 7, where the water usually begins to freeze, is directly heated by geothermal heat, and furthermore, the water meter 7 is placed in a warm atmosphere generated by the geothermal heat, thereby increasing the amount of water. Convection of water in the water container 7 is ensured and it is prevented from freezing.

In addition, when you open the cover plate 5 of the housing 1 when reading the meter,
Since only the scale plate portion of the water meter 7 covered with the heat-insulating cover body 11 can be seen through the window hole 12, there is no need to remove the heat-insulating cover body 11 when reading the meter.

[Effect of idea]

According to the present invention, a heating ring is integrally fixed to the upper part of a heat pipe that absorbs geothermal heat, and this heating ring is wound and attached to the outer circumference of the upper body of a water meter. Since geothermal heat can be directly conducted to the upper part of the water dispenser, the upper part of the water dispenser can be reliably kept warm and the water in the water dispenser can be reliably prevented from freezing.

Further, since the heat pipe is disposed on the side of the water meter by tightening the heating ring to the outer periphery of the upper body of the water meter, it can be easily set into an existing water meter. Therefore, it is possible to provide a freezing prevention device for a water meter that can reliably ensure the function of the water meter with a simple structure.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a sectional view of the antifreeze device for a water meter, Figure 2 is a plan view of the same heating ring, and Figure 3 is the same as that of the water meter in Figure 1. FIG. 3 is a plan view with the casing and heat-insulating cover body removed. 7...Water meter, 17...Heat pipe, 18...
...Lower heat absorption part, 19...Upper heat radiation part, 20...Heating ring.

Claims (1)

[Scope of utility model registration request] A thermally conductive heating ring with fastening pieces formed at both ends is integrally fixed to the upper heat radiation part of the heat pipe whose lower heat absorption part is buried underground, and this heating ring is attached to the upper body of the water meter. A water meter antifreeze device characterized by being wound around the outer periphery of the device.