JP3010900U - Anti-icing device for water level gauge and water level gauge equipped with this anti-icing device - Google Patents

Abstract

(57) [Summary] [Purpose] In a water level gauge for a water storage type water source, the water level of the water level gauge and the float floating on the water level are reliably prevented from icing, and it is easy to place on the water level gauge and easy to operate and maintain. (EN) An economical anti-icing device for a water level gauge, and a water level gauge equipped with this anti-icing device. [Structure] A water circulator is placed between the water surface and the bottom of the well for the water level gauge, and water is moved to the water surface by this water circulator to prevent freezing on the water surface of the well.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides an anti-icing device for a water level gauge that prevents freezing of water on a water level of a water storage type water source such as a dam or a reservoir, and also provides a water level gauge equipped with this anti-icing device. .

[0002]

[Prior art]

 Conventionally, there is known a water level gauge in which a well or a tank communicating with the bottom of a water source is provided to measure the water level of a reservoir type water source such as a dam or a reservoir, and a float is installed on the water surface. Various devices are known for preventing freezing of the water surface of the water level gauge and the float. For example, a device that directly heats the water surface of the water level gauge to prevent icing is one that raises the water temperature by an infrared radiation device installed above the water surface of the water level gauge, or a heating element is attached to the float itself on this water surface. It is known to attach it to prevent freezing. In addition, for devices that prevent freezing by convection or stirring the water in the well or water tank of the water level gauge, an air pump is installed in this well or water tank to stir and convect the water by raising bubbles. It is known to heat water to prevent freezing. Furthermore, a device was also known in which a heating element was installed at the well of a water level gauge or at the bottom of a water tank to raise the water temperature and cause convection to prevent ice formation on the water surface.

[0003]

[Problems to be solved by the device]

 The conventional anti-icing devices for water level gauges have not been put into practical use because of their drawbacks in efficiency and economy. In other words, there is a problem in that the device that raises the water temperature by the infrared radiation device provided above the water surface has extremely low thermal efficiency and that the operation and maintenance costs are high. A device that attaches a heating element to the float itself to prevent icing has a problem that the equipment cost is high and man-hours are required for operation and maintenance. An air pump is installed in a well or a water tank to stir and convect water by rising bubbles, and in particular, in the case of a well, the discharge pressure per square centimeter is deep because the water depth is as deep as 10 to 50 m. Since it requires a compressor of 1 to 5 kg and blows cold air, it requires a lot of auxiliary equipment such as oil removal and air heating, which makes it an extremely expensive equipment and extremely troublesome to maintain. there were. In a device that installs a heating element at the bottom of a well or aquarium to raise the water temperature and thereby prevent convection from causing freezing on the water surface, the specific gravity of water is maximum at 4 ° C, so effective convection is achieved. In order to wake it up, at least the water temperature at the bottom needs to be 20 ° C. or higher, which causes a problem of high power consumption.

In many cases, the reservoir water source is located in a place with severe conditions, and the water level gauge is installed in a place where the utility is not sufficiently supplied. Furthermore, the well for this water gauge has a diameter of several tens of centimeters and a water depth of 10 to 50 meters. Under these severe conditions, it is possible to reliably prevent ice formation on the water surface of the water level gauge and the float so that the float accurately follows the vertical displacement of the water surface, and it is easy to install, operate and maintain the water level gauge. There was a problem that a water level gauge equipped with this anti-icing device was desired.

In order to solve the above-mentioned problems and problems, the present invention reliably prevents the water level of the water level gauge and the float floating on this water level from being frozen in the water level gauge described above, and can be easily arranged on the water level gauge. In addition, it is an object of the present invention to provide an anti-icing device for a water level gauge that is easy and economical to operate and maintain, and to provide a water level gauge equipped with this anti-icing device.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention arranges a water circulator between the water surface and the bottom of a well for a water level gauge, and transfers water to the water surface by this water circulator to prevent freezing of ice on the water surface of the well. The feature is that it is prevented. A water level gauge formed of a water level well and a float floating on the water surface of this well.A water circulator was placed between the water surface and the bottom of this well, and water was moved to the water surface by this water circulator. It is characterized by being equipped with an anti-icing device designed to prevent freezing on the surface of the well. The water circulating machine is characterized in that it is arranged at the bottom of a well and its outlet is directed toward the water surface of the well. The water circulator is preferably a submersible pump, but may be a motor driven fan.

[0007]

[Action]

 A water circulator is placed between the water surface and the bottom of the well for the water level gauge, and this water circulator moves water to the water surface to prevent freezing of ice on the water surface of the well. The hot water between the water surface and the bottom is moved to the water surface, reaches the water surface, and heat exchange occurs between the hot water and the cold water near the water surface, effectively preventing freezing of the water surface of the water level gauge. To do.

[0008]

【Example】

 The anti-icing device for a water level gauge of the present invention, the water level gauge provided with the anti-icing device, and the water storage type water source will be described with reference to FIGS. In the figure, a water level gauge 1 is composed of a well 2 vertically drilled and a float 4 floating on a water surface 3 of this well 2. The bottom of the well 2 for this water level gauge 1 is connected via a communication pipe 5. It is connected to the bottom of the water storage type water source 6, which is a dam. It should be noted that reference numeral G in the drawing indicates the ground surface, and reference numeral M indicates the mountain. As a result, the water level of the water surface 11 of the water storage type water source 6 and the water level of the water surface 3 of the well 2 always match. Between the water surface 3 and the bottom of the well 2, a submersible pump 7 with a motor as a water circulator is arranged at the bottom of the well 2. The submersible pump 7 has its water outlet 8 directed toward the water surface 3, and the water inlet 9 is substantially horizontal. Here, this submersible pump 7 is arranged by suspending it from the upper end opening of the well 2 using a wire as a support material (not shown). Further, a water resistant wire is connected to the motor of the submersible pump 7. As a result, the submersible pump 7 can be easily arranged at an appropriate position between the water surface 3 and the bottom of the well 2 depending on the temperature, the fluctuation of the water surface 11 of the reservoir type water source 6 or the change of the water temperature. it can. Here, the submersible pump 7 moves the water toward the water surface 3 and heats the water. The method of arranging the submersible pump in the well is not limited to the above example. The float 4 floating on the water surface 3 of the well 2 has one end of the wire 10 connected to the upper surface thereof, and the other end connected to the detection device. Thereby, the position of the float 4, that is, the water level on the water surface 3 is detected, and the float 4 accurately follows the fluctuation of the water level on the water surface 3.

The anti-icing device for a water level gauge of the present invention can be easily installed in an existing water level gauge because the submersible pump is suspended from the upper end opening of the well of the water level gauge by a supporting member and placed in the well.

Here, the operation of the above-mentioned anti-icing device for a water level gauge and the water level gauge equipped with this anti-icing device will be described. For example, when the temperature drops below the freezing point, the water near the water level 3 on the water level gauge is cold, just before freezing. However, as the well 2 droops, the cold water disappears and becomes hot water as it approaches the bottom of the well 2 due to the so-called reversal of the temperature distribution. The anti-icing device of the present invention is based on the action principle of the inversion phenomenon of the temperature distribution in the well, and for this reason, the submersible pump is provided between the water surface 3 and the bottom of the well 2 of the water level gauge 1 and the bottom of the well 2. 7 is arranged with its water outlet 8 facing the water surface 3. Therefore, the submersible pump 7 takes in hot water from the water inlet 9 and discharges it from the water outlet 8 toward the water surface 3. The hot water exchanges heat with the surrounding water to convection, raises the temperature of the cold water near the water surface, and then returns to the bottom of the well 2 (shown by the dotted line with an arrow in the figure). This recirculation keeps the water temperature near the water surface close to that of hot water, and reliably prevents freezing of the water surface 3 and the float 4 floating on the water surface 3. Moreover, since the work by the submersible pump 7 increases the internal energy of the water molecules (heat generation), it means that the water is being heated while being refluxed, and it is extremely efficient without installing a heat source. Great practical value. The water circulating machine may be configured by a motor driven fan instead of the submersible pump.

3 and 4 show the apparatus used in the tests conducted prior to carrying out the present invention. In the figure, reference numeral 12 is a water tank formed in a substantially longitudinal cylindrical shape. The water tank 12 has an inner volume of 300 liters, and the periphery thereof is covered with a heat insulating material. A submersible pump 13 with a motor is arranged at the bottom of the water tank 12. The specifications of the submersible pump 13 are a motor output of 400 W, a water lift of 10 meters, and a discharge rate of 110 liters per minute. The test conditions were an air temperature of -7 ° C, and the temperature of the water that filled the water tank 12 was 3 ° C (at the start of the test). The results of a continuous 7-hour test under the above conditions are as follows. (1) There was no icing on the water surface of the water tank 12. (2) There was a calorific value that increased the water in the water tank 12 by 0.41 ° C. per hour. (3) The calorific value was 48% of the theoretical value. (4) In the control test, which was carried out at the same time as the above test and did not use a submersible pump, the surface of the water in the water tank 12 was covered with thin ice after one hour and twenty minutes. The effect of the present invention was confirmed by the above test.

[0012]

[Effect of device]

 The anti-icing device for a water level gauge of the present invention has a water circulator disposed between the water surface and the bottom of a well for a water level gauge, and this water circulator moves water to the water surface to prevent ice formation on the water surface of the well. Therefore, the water circulator moves the hot water below the water surface of the well to the water surface, the hot water reaches the water surface, heat exchange occurs between the hot water and the cold water near the water surface, and the water circulator also operates. Since water is heated, it has the effect of effectively preventing freezing of the water surface of the water level gauge. In addition, the above-mentioned anti-icing device for water level gauges has a simple structure, so capital investment is extremely inexpensive, and because operation and maintenance are easy, it can be economically operated even in places with severe site conditions. Have an effect. The water circulator is located at the bottom of the well, and its spout is directed toward the water surface, so that the hot water near the bottom of the well or near the bottom can be efficiently raised toward the water surface.

The water level gauge equipped with the anti-icing device of the present invention is a water level gauge well and a water level gauge formed of a float floating on the water surface of the well. A water circulator is provided between the water surface and the bottom of the well. It is equipped with an anti-icing device that is arranged to move water to the surface of the water by this water circulator to prevent freezing of ice on the surface of the well, thus preventing the formation of water on the surface of the well and floats floating on this surface. Has the effect that can. Furthermore, it is extremely easy to configure the existing water level gauge to be equipped with the above-mentioned anti-icing device.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an anti-icing device for a water level gauge of the present invention, a water level gauge provided with the anti-icing device, and a water storage type water source.

FIG. 2 is a front sectional view showing an anti-icing device for a water level gauge.

FIG. 3 is a front sectional view showing a test device.

FIG. 4 is a plan view of the test device shown in FIG.

[Explanation of symbols]

 1 Water level gauge 2 Well 3 Water level 4 Float 5 Communication pipe 6 Water storage type water source 7 Submersible pump 8 Water outlet 11 Water level of water storage type water source

Claims (6)

[Scope of utility model registration request] 1. A water circulator is arranged between the water surface and the bottom of a well for a water level gauge, and water is moved to the water surface by this water circulator so as to prevent freezing on the water surface of the well. Anti-icing device for water level gauge. 2. The water circulator is located at the bottom of the well,
The anti-icing device for a water level gauge according to claim 1, wherein the water discharge port is directed toward the water surface of the well. 3. The anti-icing device for a water level gauge according to claim 1 or 2, wherein the water circulator is an underwater pump. 4. The anti-icing device for a water level gauge according to claim 1 or 2, wherein the water circulator is a motor drive fan. 5. A water level gauge formed from a well for a water level gauge and a float floating on the water surface of the well, wherein a water circulator is arranged between the water surface and the bottom of the well, and water is circulated by the water circulator. A water gauge equipped with an anti-icing device, characterized in that it is moved to a location to prevent freezing on the surface of the well. 6. The water circulator is located at the bottom of the well,
The water level gauge provided with the anti-icing device according to claim 5, wherein the water discharge port is directed toward the water surface of the well.