JPH034176A - Watt-hour meter - Google Patents

Abstract

PURPOSE:To measure and display sent electric energy and received electric energy individually by providing a mechanism wherein two planetary gears are associated with a rotary disk rotating clockwise and counterclockwise according to the direction of passing electric energy and one gear rotates according to its support shaft moving direction while the other stays idle. CONSTITUTION:The watt-hour meter is provided with a driven gear 15 which engages a driving gear 12 coaxial with the rotary disk 11, the planetary gears 13 and 14 where support shafts 13a and 14a are fixed and differential gears 16 and 17 which engage the gears 13 and 14, and pawls 16b and 17b which allow the gears 16 and 17 to rotate only in one opposite directions. Further, the gears 16 and 17 are equipped with driving shafts 16a and 17a which transmit their rotations to two cumulative display mechanisms 18 and 19. Then when the disk 11 rotates by receiving electric power from a commercial power source, the gear 16 rotates in a normal direction, but the gear 17 is inhibited by the pawl 17b from rotating so that only the display mechanism 18 rotates. When the rotary disk 11 reverses by a solar battery power source, the gear 16 is inhibited by the pawl 16b from rotating and only the display mechanism 19 rotates. Consequently, only one voltage iron core, one current iron core, one braking magnet, etc., are provided and electric energy values in both a sending and a receiving directions can securely be measured and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an integrating power meter, and in particular to an F-meter that can measure and display transmitted power and received power separately. I calculate computation ability.

(Background of the invention) In recent years, due to advances in energy utilization technology such as solar cells and cogeneration technology, consumers are installing power generating membranes such as solar power generation devices in the commercial power distribution network and linking them with commercial power sources. It is expected that a mode of operation will become widespread in which the power generated by a solar power generation device or the like and the power required by the load are supplied and received from a commercial power supply. In such an operating state, from the consumer's perspective, if there is a shortage of power from the solar power generation device, etc., power is received, and if there is an excess, power is transmitted, and the direction of power flow is reversed. Therefore, there is a need for an integrating watt-hour meter that can accurately measure separately the amount of power that a consumer receives from commercial power (purchased power amount) and the amount of power that is transmitted (received power amount).

However, as shown in FIG. 3, in the conventional integrated watt-hour meter, the rotating disk 1 is disposed between the voltage core 2 around which the voltage coil is wound and the current iron core 3 around which the current coil is wound. Then, by the induction action of the voltage coil 4 and the current coil 5, the rotating disk l is rotated at a rotation speed proportional to the amount of electric power passing through it, and the worm gear 6 provided coaxially with the rotating disk l is used to display the cumulative value of -. 144 to rotate 8t87 to display weighing
However, if the direction of power flow is reversed, that is, the load side terminals IL and 2L become the power source, and the load side terminal IS
.

When power flows in the direction in which 2S becomes a load, the rotating disk 1 rotates in the opposite direction. Therefore, in order to prevent this reversal, the conventional integrating watt-hour meter uses a reversal prevention method as shown in Fig. 4, 111 (bl). Generally, a claw 8 is provided for the
7-22564), therefore, if you want to measure and display the amount of transmitted electricity and the amount of received electricity using this conventional integrating watt-hour meter, you will need to use this type of integrating watt-hour meter for the amount of transmitted electricity and for the amount of received electricity. I had to prepare two, one for one and one for one. In addition, when used with this tab removed, there was a drawback that only the difference between the received power amount and the transmitted power amount could be displayed. In addition, in FIG. 3, 6 is a braking magnet for the rotating disk l, Is, 2S
is the power supply side terminal, IL and 2L are the load side terminals.

In addition, as shown in FIG. 5, a main rotating shaft 22 that rotates in the normal or reverse direction in conjunction with the rotating shaft 21 that rotates in the normal or reverse direction in proportion to the amount of electric power is provided on the same axis as the main rotating shaft 22. A first gear 23 and a second gear 24 that can freely rotate in forward and reverse directions are arranged,
The main rotating shaft 22 is located between the main rotating shaft 22 and the first f& wheel 23.
The first ratchet machine side 31 that transmits the forward rotation of to the first gear 23
In addition, a second ratchet 4 [32] is provided between the main rotation shaft 22 and the second f&wheel 24 to transmit the reverse rotation of the main rotation shaft 22 to the second gear 24, and a cumulative display mechanism for cumulatively displaying the amount of electric power is provided. A first reversing gear 28 and a second reversing gear 29 are integrally provided coaxially with a driving gear 27 meshing with a driven gear 26 fixed to a rotating shaft 25 of the first reversing gear 2.
8 is connected to the first gear 23, and a second reversing gear 29 is connected to the second gear 29 via an intermediate gear 30.
(See Publication No. 1183).

However, in this conventional electric energy cumulative metering device, even if the direction of the current changes, the driven gear of the cumulative display aati always rotates in the same direction, so the total amount of transmitted electric power and received electric power is calculated by the cumulative display device. However, the amount of transmitted power and the amount of received power were not displayed separately. Therefore, even with this power accumulating device, it is not possible to accurately measure and display the amount of power received from the commercial power source or the amount of power transmitted to the commercial power source.

The present invention was devised in view of the problems of such conventional devices, and is an integrated power system that can measure and display the amount of transmitted power and the amount of received power separately, even though it uses one rotating disk. The purpose is to provide a weighing meter.

(Structure of the Invention) According to the integrating wattmeter according to the present invention, a rotating disk that rotates forward or backward depending on the amount and direction of passing power, and a driving gear provided coaxially with the rotating disk. , a driven gear that interlocks with the driving gear, a planetary gear having a support shaft fixed to the driven gear, and a pawl that rotates on one side and stops rotating on the other according to the direction of movement of the support shaft of the planetary gear. The above object is achieved by comprising two differential gears, each of which has one, and meshes with the planetary gear, and two cumulative display mechanisms that are separately driven by these differential gears.

(Example) Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

FIG. 1 shows T? ! It is a schematic configuration diagram showing an embodiment of a computerized capacity meter, in which 11 is a rotating disk, and 12 is a driving gear provided coaxially with the rotating disk.

This drive gear 12 is composed of, for example, a bevel gear.

The driving gear 12 is a support shaft 13a of a planetary gear 13.14.
.

14a meshes with a fixed driven gear 15.

The planetary gears 13 and 14 include this planetary gear, +4
Differential gears for converting rotational motion into orthogonal rotational motion! 6.17 is engaged. This differential gear 16.
17 is provided with claws +6b and 17b so that they can only rotate in one direction, which is the opposite direction.

The differential gears 16, 17 are provided with drive shafts 16a, 17a, respectively, for transmitting the rotation of the differential gears 16, 17 to the two cumulative displays 18, 19, respectively.

These two cumulative display mechanisms 18 and 19 are configured to separately display, for example, the amount of transmitted power and the amount of received power.

Next, the operation of the above configuration will be explained based on the second [A].

In FIG. 2, in order to provide two cumulative display mechanisms close to each other, the rotation of one differential gear 17 is transmitted to one cumulative display mechanism 19 via two spur gears 20 and 21. It is configured.

In addition, in FIG. 2, the solid line arrow indicates the forward rotation direction,
The dotted arrow indicates the direction of reverse rotation.

First, for example, when power is received from a commercial power source and the rotating disk 11 rotates in the forward rotation direction, the drive gear 15 rotates in the forward rotation direction, and as the driven gear 15 rotates, the supporting shafts of the planetary gears 13 and 14 13a and 14a move.

As the support shafts 13a and 14a move, the differential gear 16
．． 17 also tries to rotate, but since one differential gear 17 rotates in the opposite direction, the rotation is prevented by the claw +7b. Therefore, as the spindle of the planetary gear 13.14 moves, the planetary gear 13.14 rotates, and the planetary gear 13,
14, only the other differential gear 16 rotates in the forward rotation direction, and for example, only the power receiving cumulative display mechanism 18 rotates.

On the other hand, for example, when power is transmitted from a solar battery power source, the rotating disk 1
1 rotates in the reverse rotation direction, the drive gear 12 rotates in the reverse rotation direction, and as the driven gear 15 rotates, the support shafts 13a and 14a of the planetary gears 13 and 14 move. As the support shafts 13a and 14a move, the differential gear 16.
17 also tries to rotate, but one of the gears 16 rotates in the opposite direction and is prevented from rotating by the claw. Therefore, as the shaft of the planetary gear 13.14 moves, the planetary gear 13.14 rotates, and as the planetary gear 13.14 rotates, only the drive gear 17 rotates in the opposite rotation direction. For example, only the power transmission accumulation display mechanism will rotate.

In the above embodiment, if the gear ratio of the spur gears 20 and 21 is changed from 1:1 to 1:n, the metric constant of the amount of transmitted power and the amount of received power can be changed to I: I/n, and the When making a difference in electricity charges per KWH between power transmission and power transmission, it is also possible to receive a measured value converted to an integrated value of one of the measurements.

Further, in the above embodiment, the support shaft 13 of the planetary gear 13.14
Although it has been described that a and 14a are provided on the driven gear 15 that interlocks with the driving gear 12, the invention is not limited to this embodiment. For example, the planetary gear 13 may be provided directly on the driving gear 12.
．． 14 support shafts 13a, 14a may be provided; in this case, the driven gear 15 is unnecessary.

(Effects of the Invention) As described above, according to the integrating power meter according to the present invention,
a rotating disk that rotates forward or backward in proportion to the amount and direction of passing electric power; a driving gear disposed coaxially with the rotating disk;
A driven gear interlocked with the driving gear, a planetary gear having a support shaft fixed to the driven gear, and a pawl that rotates on one side and stops rotating as the support shaft of the planetary gear moves. In addition, since it is equipped with two differential gears meshing with the planetary gear and two cumulative display at* separately driven by the two differential gears, the voltage iron core and the current iron core of the induction type watt-hour meter. , braking magnet, etc., can reliably measure and display the amount of electric power in both directions, the amount of transmitted power and the amount of received power.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the main parts of the Fftft calculation power meter according to the present invention, FIG. 2 is a diagram for explaining the operating state, and FIG. Figure 4 (
a) (The figures show the claws of a conventional watt-hour meter, and Figure 5 shows another conventional watt-hour meter. ll1 Rotating disk 12. Drive gear

Claims (1)

[Claims] A rotating disk that rotates forward or backward depending on the amount and direction of passing electric power, a driving gear provided on the rotating shaft of the rotating disk, a driven gear that interlocks with the driving gear, and a driven gear that is connected to the driven gear. A planetary gear having a fixed support shaft, and two differential gears that mesh with the planetary gear, one of which rotates and the other of which has a pawl that stops rotating in accordance with the direction of movement of the support shaft of the planetary gear. and two integration display mechanisms separately driven by these differential gears.