CN2158087Y

CN2158087Y - Electric current meter

Info

Publication number: CN2158087Y
Application number: CN 92244149
Authority: CN
Inventors: 刘福财
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-10
Filing date: 1992-12-10
Publication date: 1994-03-02
Anticipated expiration: 2002-12-10

Abstract

The utility model discloses a watt-hour meter controlling the electric quantity. The utility model comprises an induction type mechanically counting watt-hour meter. The utility model is characterized in that a thyristor switching circuit and a mechanically controlled switch are added in the induction type mechanically counting watt-hour meter; the thyristor switching circuit connects with an input wire end of the watt-hour meter in series; the mechanically controlled switch controls the 'on' and 'off' of the thyristor switching circuit. The thyristor switching circuit is composed of a thyristor element SCR, resistances R1 and R2 and a capacitor C.

Description

Electric current meter

The utility model is about a kind of electrical instrument, more specifically says so about a kind of electric energy control watt-hour meter.

The induction type mechanical count watt-hour meter of widespread use on the current social is used for calculating (accumulative total) power consumption, and in the electric industry system, every month (season) need check meter to the doorstep to user's clearing, collects the electricity charge as calculated by check meter number.This working method, to some area and users such as most of rural area, electricity consumption in season and temporary electricity, the recovery of the electricity charge is difficult to guarantee.

The purpose of this utility model will provide a kind of electric energy control watt-hour meter exactly.For this reason, designed an electric quantity control unit,, watt-hour meter has been increased to set power consumption, automatically the function of monitoring user institute consumes power and with the function of power consumption automatic control power supply switching with after this device and the watt-hour meter combination.Use this table, the user must pay tariff earlier in advance, buy electric weight (setting electric weight), also must pay tariff in advance again before each electric weight of buying uses up or uses up, (every purchase once to buy electric weight, utility personnel will be adjusted the pointer on the charge value scale mark, the indicated value of pointer on the charge value scale mark equated with electric weight that the user bought, during user power utilization, pointer will be on the charge value scale mark direction to " O " move, be the electric weight that automatic monitoring user consumes); Otherwise, in case the electric weight of being bought (setting electric weight) uses up, this table will be cut off the electricity supply automatically, stop the user being powered, this shows, as long as this Biao Biaonei has the setting electric weight, electric weight is not set in normally electricity consumption of user in the table, the user will can not get power supply, promptly whether this table is controlled by electric weight user's power supply, and therefore, this table called after electric weight is by the system watt-hour meter.

According to electric energy control watt-hour meter of the present utility model, it comprises an induction type mechanical count watt-hour meter, it is characterized in that: in above-mentioned induction type mechanical count watt-hour meter, increased transwitch circuit and mechanically controlled switch; The transwitch circuit is serially connected in the input wiring terminal of watt-hour meter; Mechanically controlled switch control transwitch circuit " leading to " is made up of controllable silicon original paper SCR, resistance R 1, R2 and capacitor C with " breaking " described transwitch circuit.

Described mechanically controlled switch is that the end at former counter gear axle (1) adds a pinion wheel (2), and by its drive gear wheel (3), on leading screw (4), be provided with a movable contact (6), go up a connection charge value pointer (10) downwards at movable contact (6), indicate charge value on the charge value scale mark (9) that is located on the counter number grid (12) with it, the rotation of aluminium dish (11) can drive each gear and together rotate, and movable contact (6) can be gone up at leading screw (4) and move to the direction that is located at the gauge tap (8) on the support (5).Said induction type mechanical count watt-hour meter can be a three phase watt-hour meter, all is connected in series a transwitch circuit at every phase input wiring terminal; Mechanically controlled switch is controlled three controllable switch circuit simultaneously.Or a certain mutually on the serial connection transwitch circuit, it controls an A.C. contactor that is connected on output terminal.

Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model electric energy control watt-hour meter.

Fig. 1 is the electrical block diagram of a kind of embodiment of the utility model electric energy control watt-hour meter.

Fig. 2 is the principle assumption diagram of control gear in the utility model electric energy control watt-hour meter;

Fig. 3 is the electrical block diagram of the another kind of embodiment of the utility model electric energy control watt-hour meter.

The electric energy control watt-hour meter is based on induction type mechanical count watt-hour meter, the mechanically controlled switch that the transwitch circuit that the several electronic components that can hold in the adding table is formed and several mechanical component are formed and a kind of novel electrical instrument that constitutes.

Fig. 1 is the embodiment of the utility model electric energy control watt-hour meter under the single-phase electricity situation.

Inlet wire (phase line) end at watt-hour meter, seal in by resistance R 1, R2, the transwitch circuit that capacitor C and bidirectional triode thyristor SCR form, behind the watt-hour meter place in circuit, (connect) with user's load, power supply charges to C through R1, and through the central electrode T1 of R2 to SCR, the current coil of T2 and watt-hour meter is powered to the user, when the supply voltage zero passage, SCR ends, at this moment C discharge, make C, R2, the electric current of this branch road of G is non-vanishing, it forms a voltage between the G of the SCR utmost point and central electrode T1, this voltage will make SCR triggering and conducting when other half period of supply voltage begins, therefore, this voltage is called trigger voltage, because the existence of this trigger voltage, suitably select the size of RC, SCR will keep conducting in the whole cycle of supply voltage (360 °), watt-hour meter will be under the state that is run well by the size of power consumption (load), provide waveform complete supply voltage to user's (load), if the G utmost point and the short circuit of the T1 utmost point with SCR, then short circuit trigger voltage, SCR will end when the supply voltage zero passage because of losing trigger voltage, and therefore the user will can not get supply voltage.For realizing that this table has the function of automatic control power supply switching, can respectively draw a line A and B as the control contact by the G utmost point of SCR and the T1 utmost point, the conducting of controlling SCR with the connecting and disconnecting of this contact A and B with end, during the SCR conducting, the user obtains power supply; When SCR ended, the user obtained power supply, as seen, as long as control the conducting of SCR and end the power supply whether control that has just realized user side.

The connecting and disconnecting of control contact A and B are to have increased a pinion wheel and gear wheel and the leading screw that together rotates with this gear wheel and movable contact and gauge tap that is located on the leading screw are controlled at former counter mechanical driving part.Its principle is seen Fig. 2 (dotted line is interior for increasing part newly among the figure);

End at former counter gear axle (1) adds a pinion wheel (2), and by its drive gear wheel (3), Large Gear Shaft During (4) is the leading screw that together rotates with gear wheel (3), be installed on the support (5), on leading screw (4), be provided with a movable contact (6), go up a connection charge value pointer (10) downwards at movable contact (6), indicate charge value on the charge value scale mark (9) that is located on the counter number grid (12) with it, when user power utilization, aluminium dish (11) rotates, and drive each gear and together rotate, because leading screw (4) and gear wheel (3) together rotate, movable contact (6) will leading screw (4) go up certain position (this position by utility personnel according to user's number of paying tariff in advance, the charge value decision that sets) moves to the direction that is located at the gauge tap (8) on the support (5), increase along with power consumption, movable contact (6) is more and more nearer with the distance of gauge tap (8), the contact screw (7) that adjustment is located on the movable contact (6) makes that setting electric weight uses up, contact screw (7) just in time closes gauge tap (8), control contact A and B are switched on, short circuit trigger voltage, SCR ends, and stops the power supply to the user.At this moment, charge value pointer (10) is designated as " 0 " on charge value scale mark (9), but former counter total electric weight that still explicit user consumed.

Fig. 3 is the embodiment of the utility model electric energy control watt-hour meter under the three-phase current situation.

The electric energy control watt-hour meter can convert with three phase watt-hour meter by any (model) is single-phase.The repacking of three-phase kilowatt-hour meter can seal in a transwitch circuit in the end of incoming cables of every phase, the gauge tap (8) of machinery control section can be used three synchro switches (all the other are constant) instead, make the contact screw (7) on the movable contact (6) simultaneously three synchro switches to be closed, No. three transwitch circuit turn-off simultaneously, three phase watt-hour meter or the bigger watt-hour meter of power load in the batch meter, also can control an A.C. contactor with No. one transwitch circuit, this road can be connected in parallel on 0 and go up mutually with any one of A, B, C, is connected in parallel on A among the figure and goes up mutually

Electric energy control watt-hour meter technology is simple, and operation is normal, and fault is few, (because of not destroying former counting mechanism of a meter mechanism, can so and not lose electric weight even control device damages also).Noiseless to electrical appliance, (can produce electric quantity control unit if come into operation, the watt-hour meter that has in the society is reequiped, also can be) by producer's direct production electric energy control watt-hour meter, the electricity charge that not only can guarantee the electric industry system are reclaimed, make electricity really become commodity, and help planned supply and use of electric power and using electricity wisely.

Claims

1, a kind of electric energy control watt-hour meter, it comprises an induction type mechanical count watt-hour meter, it is characterized in that: in above-mentioned induction type mechanical count watt-hour meter, increased transwitch circuit and mechanically controlled switch; The transwitch circuit is serially connected in the input wiring terminal of watt-hour meter; " leading to " and " breaking " of mechanically controlled switch control transwitch circuit.

2,, it is characterized in that described transwitch circuit is made up of controllable silicon original paper SCR, resistance R 1, R2 and capacitor C according to the electric energy control watt-hour meter of claim 1.

3, electric energy control watt-hour meter according to claim 1, it is characterized in that described mechanically controlled switch is that a end at former counter gear axle (1) adds a pinion wheel (2), and by its drive gear wheel (3), on leading screw (4), be provided with a movable contact (6), go up a connection charge value pointer (10) downwards at movable contact (6), indicate charge value on the charge value scale mark (9) that is located on the counter number grid (12) with it, the rotation of aluminium dish (11) can drive each gear and together rotate, and movable contact (6) can be gone up at leading screw (4) and move to the direction that is located at the gauge tap (8) on the support (5).

4,, it is characterized in that said induction type mechanical count watt-hour meter is a three phase watt-hour meter, all is connected in series a transwitch circuit at every phase input wiring terminal according to the electric energy control watt-hour meter of claim 1; Mechanically controlled switch is controlled three controllable switch circuit simultaneously.

5, according to the electric energy control watt-hour meter of claim 1, it is characterized in that said induction type mechanical count watt-hour meter is a three phase watt-hour meter, a certain mutually on the serial connection transwitch circuit, it controls an A.C. contactor that is connected on output terminal.