JPH0128465Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a mercury electricity meter that measures energization time.

Prior Art In general, in this type of mercury electricity meter, as shown in FIG. 1, mercury 4
and an electrolytic solution 5, and are configured so that the energization time can be cumulatively measured according to the amount of movement of the electrolytic solution 5 due to electrolysis of the mercury 4.
That is, when a DC voltage E (or a voltage obtained by rectifying an AC voltage with a diode) is applied between the electrodes 1 and 2 via a resistor R, mercury 4 dissolves into the electrolyte 5 on the + side, and electrolysis occurs from the - side. Mercury ions in the liquid 5 begin to precipitate, and as a result, the electrolyte 5 moves from the - side to the + side as shown by arrow v in the figure. The amount of movement is proportional to the amount of electricity applied according to Faraday's law, so if the current I is kept constant, the amount of time the electrolyte 5 moves in the glass tube 3 can be used to determine the energization time. Become. In this case, the position of the electrolytic solution 5 is maintained even if the energization is stopped, and the total energization time can be accumulated even if the energization is performed intermittently. Specifically, as shown in FIG. 2, the glass tube 3 is placed inside a case 7 made of ABC resin or the like and equipped with a time display scale 6. In the figure, reference numerals 8 and 9 indicate metal caps that also serve as electrodes 1 and 2, and are adapted to be attached to, for example, an electrode holder (not shown). However, in such a mercury electricity meter, since a liquid is used as a measuring medium for the energization time, there is a problem in that when vibration is applied to the glass tube 3, the indicated position of the electrolytic solution 5 becomes incorrect.

In the conventional mercury electricity meter, when installing the glass tube 3 in the case 7, the glass tube 3 is inserted into the notch 10 integrated with the case 7, for example, as shown in FIG.
Insert the end of the to support it, and
Since the glass tube 3 is fixedly installed in the case 7 by molding the lead-in part of the lead 11 with epoxy resin 12, if vibration occurs in the case 7, the vibration is completely damped. It is designed so that it is transmitted to the glass tube 3 as it is without being transmitted. Therefore, with such conventional mercury electricity meters, it is difficult to measure the energization time to the electrical load by installing the mercury electricity meter directly on a vibrating electrical load or an electrical load placed on a vibrating object. It has become something unsuitable. In particular, for special vehicles that do not have odometers, it is necessary to measure the cumulative power-on time in the engine's ignition system to know the engine operating time in order to perform periodic maintenance and inspection of the engine. be.

Purpose This invention was made taking the above points into consideration.
To provide a mercury electricity meter capable of accurately measuring the energization time to an electrical load even if the mercury electricity meter is installed directly on a vibrating electrical load or an electrical load placed on a vibrating object. It is something.

Configuration An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In the mercury electricity meter according to the present invention, as shown in FIG. A vibration-proof structure is provided in a floating state so that the case 13 does not come into contact with the case 13. Further, a transparent window 15 is provided on the top surface of the case 13 in correspondence with the glass tube 3 housed inside the case 13, and a display surface is formed by attaching a time display scale 6 to the window frame. It's becoming like that. In that case, the case 13 itself may be made of a transparent material without providing the window 15. Furthermore, terminals 16 and 17 are drawn out from the bottom surface of the case 13, and thin and flexible lead wires 18 are connected between the terminals 16 and 17 and the electrodes 1 and 2 at both ends of the glass tube 3.
are connected to each other by Each lead wire 1
8 are given slack to prevent the vibration of the case 13 from being transmitted to the glass tube 3 through the lead wire 18. As the vibration isolating material 14, transparent gel-like silicone rubber, for example, which has excellent vibration absorption properties, is suitable. In addition, silicone rubber is free from electrolytic corrosion and has excellent dielectric properties and electrical properties such as corona resistance and arc resistance, and these properties are stable against changes in temperature and humidity, as well as being resistant to heat, cold, and weather. Because it is excellent in
It has no electrical effect on the mercury electricity meter. Furthermore, there are no restrictions on where the mercury electricity meter can be installed, making it particularly suitable for installing the mercury electricity meter in the engine part of an automobile.
It goes without saying that in the case of the resistor R and the AC source in the circuit configuration of FIG. 1, the diodes may be housed together in the case 13.

FIG. 5 shows another embodiment of the present invention, in which the conventional mercury electricity meter 7 shown in FIG. At the same time, the lead wires 18 drawn out from the metal caps 8 and 9 are slackened and connected to the respective terminals 16 and 17, respectively. In this case, a transparent window 15 may be provided on the top surface of the case 20 corresponding to the mercury electricity meter housed therein, or at least the top surface of the case 20 may be made of a transparent material. good.

Effects As described above, regarding the mercury electricity meter according to the present invention,
It has an anti-vibration structure in which a glass tube filled with at least mercury and an electrolyte is placed in a floating state via an anti-vibration material within a case, and is placed on a vibrating electrical load or a vibrating object. Even if a mercury electricity meter is installed directly on an electrical load, it has the excellent advantage of being able to accurately measure the energization time to the electrical load without being affected by vibration.

[Brief explanation of the drawing]

Figure 1 is an electric circuit diagram showing the basic configuration of a mercury electricity meter, Figure 2 a and b are a plan view and front view of a conventional mercury electricity meter, and Figure 3 is a conventional mercury electricity meter. 4a and 4b are plan views and front views showing one embodiment of the mercury electricity meter according to the present invention, and FIGS. 5a and 5b are perspective views showing how the glass tube is supported in
b is a plan view and a front view showing a mercury electricity meter in another embodiment of the present invention. 1, 2... Electrode, 3... Glass tube, 4... Mercury, 5... Electrolyte, 6... Time display scale, 8, 9
...Metal cap, 13,20...Case, 14
...Vibration isolation material, 15...Window, 16,17...Terminal,
18... Lead wire.

Claims (1)

[Claims for Utility Model Registration] 1. Mercury and electrolyte are sealed in a sealed glass tube with electrodes drawn out from both ends, and when electricity is applied between the electrodes, the amount of movement of the electrolyte due to electrolysis of mercury is Accordingly, a mercury electricity meter for measuring energization time is characterized in that the glass tube is placed in a floating state within a case via a vibration isolating material. 2. The mercury electricity meter according to item 1 above, wherein the vibration isolating material is a transparent gel-like substance.